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Table of Contents

Notes for the Cisco 4000 Series for Cisco IOS Release 11.2

Notes for the Cisco 4000 Series for Cisco IOS Release 11.2

July 10, 2000

Note You can find the most current Cisco IOS documentation on Cisco Connection Online (CCO). These electronic documents may contain updates and modifications made after the hardcopy documents were printed.

These release notes for the Cisco 4000 series routers support Cisco IOS Release 11.2, up to and including Release 11.2(23). These release notes are updated as needed to describe new features, memory requirements, hardware support, software platform deferrals, and changes to the microcode or modem code and related documents.

For a list of software caveats that apply to Release 11.2(23), see the"Caveats" section. and Caveats section of Release Notes for Cisco IOS Release 11.2 . This caveats document is updated for every maintenance release.

Use these release notes with Release Notes for Cisco IOS Release 11.2  located on Cisco Connection Online and the Documentation CD-ROM.

Contents

These release notes describe the following topics:

System Requirements

This section describes the system requirements for Release 11.2:

Memory Requirements


Table 1: Memory Requirements for the Cisco 4000 Series Routers
Feature Set by Platform Image Name Minimum Flash Memory Minimum DRAM Memory Runs From1
Cisco 4X00 Cisco 4X00-M

Cisco 4000 and Cisco 4000-M

IP

c4000-i-mz

4 MB Flash

16 MB RAM

8 MB RAM

RAM

IP Plus2

c4000-is-mz

4 MB Flash

16 MB RAM

8 MB RAM

RAM

IP Plus 40

c4000-is40-mz

4 MB Flash

16 MB RAM

8 MB RAM

RAM

IP Plus 56

c4000-is56-mz

4 MB Flash

16 MB RAM

8 MB RAM

RAM

IP/IPX/AT/DEC

c4000-d-mz

4 MB Flash

16 MB RAM

8 MB RAM

RAM

IP/IPX/AT/DEC Plus

c4000-ds-mz

4 MB Flash

16 MB RAM

16 MB RAM

RAM

IP/IPX/AT/DEC Plus 40

c4000-ds40-mz

4 MB Flash

16 MB RAM

16 MB RAM

RAM

IP/IPX/AT/DEC Plus 56

c4000-ds56-mz

4 MB Flash

16 MB RAM

16 MB RAM

RAM

IP/IPX/IBM/APPN

c4000-ainr-mz

4 MB Flash

32 MB RAM

32 MB RAM

RAM

Enterprise

c4000-j-mz

4 MB Flash

16 MB RAM

16 MB RAM

RAM

Enterprise Plus

c4000-js-mz

8 MB Flash

16 MB RAM

16 MB RAM

RAM

Enterprise Plus 40

c4000-js40-mz

8 MB Flash

16 MB RAM

16 MB RAM

RAM

Enterprise Plus 56

c4000-js56-mz

8 MB Flash

16 MB RAM

16 MB RAM

RAM

Enterprise/APPN Plus

c4000-ajs-mz

8 MB Flash

32 MB RAM

32 MB RAM

RAM

Enterprise/APPN Plus 40

c4000-ajs40-mz

8 MB Flash

32 MB RAM

32 MB RAM

RAM

Enterprise/APPN Plus 56

c4000-ajs56-mz

8 MB Flash

32 MB RAM

32 MB RAM

RAM

Cisco 4500
Cisco 4500-M

IP

c4500-i-mz

4 MB Flash

32 MB RAM

16 MB RAM3

RAM

IP Plus4

c4500-is-mz

4 MB Flash

32 MB RAM

16 MB RAM

RAM

IP Plus 40

c4500-is40-mz

4 MB Flash

32 MB RAM

16 MB RAM

RAM

IP Plus 56

c4500-is56-mz

4 MB Flash

32 MB RAM

32 MB RAM

RAM

IP/IPX/AT/DEC

c4500-d-mz

4 MB Flash

32 MB RAM

16 MB RAM

RAM

IP/IPX/AT/DEC Plus

c4500-ds-mz

4 MB Flash

32 MB RAM

16 MB RAM

RAM

IP/IPX/AT/DEC Plus 40

c4500-ds40-mz

4 MB Flash

32 MB RAM

16 MB RAM

RAM

IP/IPX/AT/DEC Plus 56

c4500-ds56-mz

4 MB Flash

32 MB RAM

16 MB RAM

RAM

IP/IPX/IBM/APPN

c4500-ainr-mz

8 MB Flash

32 MB RAM

32 MB RAM

RAM

Enterprise

c4500-j-mz

8 MB Flash

32 MB RAM

16 MB RAM

RAM

Enterprise Plus

c4500-js-mz

8 MB Flash

32 MB RAM

16 MB RAM

RAM

Enterprise Plus 40

c4500-js40-mz

8 MB Flash

32 MB RAM

16 MB RAM

RAM

Enterprise Plus 56

c4500-js56-mz

8 MB Flash

32 MB RAM

16 MB RAM

RAM

Enterprise/APPN Plus

c4500-ajs-mz

8 MB Flash

32 MB RAM

32 MB RAM

RAM

Enterprise/APPN Plus 40

c4500-ajs40-mz

8 MB Flash

32 MB RAM

32 MB RAM

RAM

Enterprise/APPN Plus 56

c4500-ajs56-mz

8 MB Flash

32 MB RAM

32 MB RAM

RAM

Cisco 4700
Cisco 4700-M

IP

c4500-i-mz

4 MB Flash

16 MB RAM

16 MB RAM

RAM

IP Plus4

c4500-is-mz

4 MB Flash

16 MB RAM

16 MB RAM

RAM

IP Plus 40

c4500-is40-mz

4 MB Flash

16 MB RAM

16 MB RAM

RAM

IP Plus 56

c4500-is56-mz

4 MB Flash

32 MB RAM

32 MB RAM

RAM

IP//IPX/AT/DEC

c4500-d-mz

4 MB Flash

16 MB RAM

16 MB RAM

RAM

IP//IPX/AT/DEC Plus

c4500-ds-mz

4 MB Flash

16 MB RAM

16 MB RAM

RAM

IP//IPX/AT/DEC Plus 40

c4500-ds40-mz

4 MB Flash

16 MB RAM

16 MB RAM

RAM

IP//IPX/AT/DEC Plus 56

c4500-ds56-mz

4 MB Flash

16 MB RAM

16 MB RAM

RAM

IP/IPX/IBM/APPN

c4500-ainr-mz

8 MB Flash

32 MB RAM

32 MB RAM

RAM

Enterprise

c4500-j-mz

8 MB Flash

16 MB RAM

16 MB RAM

RAM

Enterprise Plus

c4500-js-mz

8 MB Flash

16 MB RAM

16 MB RAM

RAM

Enterprise Plus 40

c4500-js40-mz

8 MB Flash

16 MB RAM

16 MB RAM

RAM

Enterprise Plus 56

c4500-js56-mz

8 MB Flash

16 MB RAM

16 MB RAM

RAM

Enterprise/APPN Plus

c4500-ajs-mz

8 MB Flash

32 MB RAM

32 MB RAM

RAM

Enterprise/APPN Plus 40

c4500-ajs40-mz

8 MB Flash

32 MB RAM

32 MB RAM

RAM

Enterprise/APPN Plus 56

c4500-ajs56-mz

8 MB Flash

32 MB RAM

32 MB RAM

RAM

1When a system is running from Flash memory, you cannot update the system while it is running. You must use the Flash memory load helper.
2Plus for the Cisco 4000 and Cisco 4000-M includes NAT and IBM (if IBM is not already included).
3The Cisco 4500 requires 16 MB DRAM when two NP-CT1 or two NP-CE1 Network Processor Modules are installed in the chassis.
4Plus for the Cisco 4500, Cisco 4500-M, Cisco 4700, and Cisco 4700-M includes NAT, ISL, LANE, and IBM (if IBM is not already included).

Hardware Supported

Cisco IOS Release 11.2(23) supports the Cisco 4000 series:

The following LAN interfaces are supported on Cisco 4000 series routers:

The following WAN data rates are supported on Cisco 4000 series routers:

The following WAN interfaces are supported on Cisco 4000 series routers:

Determining the Software Version

To determine the version of Cisco IOS software running on your Cisco 4000 series router, log in to the router and enter the show version EXEC command:

router> show version
Cisco Internetwork Operating System Software
IOS (tm) 4000 Software (C4000-JS-M), Version 11.2(23).......

Upgrading to a New Software Release

For general information about upgrading to a new software release, see Cisco  IOS Upgrade Ordering Instructions located at:

http://www.cisco.com/warp/public/cc/cisco/mkt/ios/prodlit/957_pp.htm

Feature Set Tables

Cisco IOS software is packaged into feature sets consisting of software images---depending on the platform. Each feature set contains a specific set of Cisco IOS features.


Table 2: Feature Set Matrix for the Cisco 4000 Series
Standard Feature Sets Cisco 4000 Series

IP

Basic, Plus, Encrypt

IP/IPX/AppleTalk/DEC

Basic, Plus, Encrypt

Enterprise

Basic, Plus, Encrypt

Enterprise and APPN

Plus, Encrypt

IP/IPX/IBM and IBM

Basic

Caution Cisco IOS images with strong encryption (including, but not limited to, 168-bit (3DES) data encryption feature sets) are subject to United States government export controls and have limited distribution. Strong encryption images to be installed outside the United States are likely to require an export license. Customer orders may be denied or subject to delay due to Unites States government regulations. When applicable, obtain local import and use authorizations for all encryption strengths. Contact your sales representative or distributor for more information, or send e-mail to export@cisco.com.

Table 3 lists the features and feature sets supported by the Cisco 4000 series in Cisco IOS Release 11.2(23) and uses the following conventions:

Note This feature set table only contains a selected list of features. This table is not cumulative--- nor does it list all the features in each image.


Table 3: Feature List by Feature Set for the Cisco 4000 Series Routers
Feature Feature Set
IP Routing IP/IPX/
IBM/APPN1 		IP/IPX/
AppleTalk/
DEC 		Enterprise2
LAN Support
Apollo Domain

No

No

No

Yes

AppleTalk 1 and 23

No

No

Yes

Yes

Banyan VINES

No

No

No

Yes

Concurrent routing and bridging (CRB)

Yes

Yes

Yes

Yes

DECnet IV

No

No

Yes

Yes

DECnet V

No

No

No

Yes

GRE

Yes

Yes

Yes

Yes

Integrated routing and bridging (IRB)4

Yes

Yes

Yes

Yes

IP

Yes

Yes

Yes

Yes

LAN extension host

Yes

Yes

Yes

Yes

Multiring

Yes

Yes

Yes

Yes

Novell IPX5

No

Yes

Yes

Yes

OSI

No

No

No

Yes

Source-route bridging6

No

No

No

No

Transparent and translational bridging

Yes

Yes

Yes

Yes

VLANs (ISL7 and IEEE 802.10) (Cisco 4500 only)

Plus

No

Plus

Plus

XNS

No

No

No

Yes

WAN Services
ATM LAN emulation: DECnet routing, XNS routing, and Banyan VINES support (Cisco 4500 and Cisco 4700 only)8

No

No

Plus

Plus

ATM LAN emulation: Hot Standby Router Protocol (HSRP) and Simple Server Redundancy Protocol (SSRP)
(Cisco 4500 and Cisco 4700 only)

Plus

No

Plus

Plus

ATM: Rate queues for SVC per subinterface (Cisco 4000, Cisco 4500, and Cisco 4700 only)

Plus

No

Plus

Plus

ATM: UNI 3.1 signaling for ATM
(Cisco 4500 and Cisco 4700 only)

Plus

No

Plus

Plus

Combinet Packet Protocol (CPP)

Yes

Yes

Yes

Yes

Dialer profiles

Yes

Yes

Yes

Yes

Frame Relay

Yes

Yes

Yes

Yes

Frame Relay SVC Support (DTE)

No

No

No

Yes

Frame Relay traffic shaping

Yes

Yes

Yes

Yes

Half bridge/half router for CPP and PPP

Yes

Yes

Yes

Yes

HDLC

Yes

Yes

Yes

Yes

IPXWAN 2.0

No

Yes

Yes

Yes

ISDN9

Yes

Yes

Yes

Yes

Multichassis Multilink PPP (MMP)

No

No

No

Yes

NetBEUI over PPP

No

No

No

Yes

PPP10

Yes

Yes

Yes

Yes

SMDS

Yes

Yes

Yes

Yes

Switched 56

Yes

Yes

Yes

Yes

Virtual Private Dial-Up Network (VPDN)

Plus

No

Plus

Yes

X.2511

Yes

Yes

Yes

Yes

WAN Optimization
Bandwidth-on-demand

Yes

Yes

Yes

Yes

Custom and priority queuing

Yes

Yes

Yes

Yes

Dial backup

Yes

Yes

Yes

Yes

Dial-on-demand

Yes

Yes

Yes

Yes

Header12, link and payload compression

Yes

Yes

Yes

Yes

Snapshot routing

Yes

Yes

Yes

Yes

Weighted fair queuing

Yes

Yes

Yes

Yes

IP Routing
BGP

Yes

Yes

Yes

Yes

BGP413

Yes

Yes

Yes

Yes

EGP

Yes

Yes

Yes

Yes

Enhanced IGRP

Yes

Yes

Yes

Yes

Enhanced IGRP Optimizations

Yes

Yes

Yes

Yes

ES-IS

No

No

No

Yes

IGRP

Yes

Yes

Yes

Yes

IS-IS

No

No

No

Yes

Named IP Access Control List

Yes

Yes

Yes

Yes

Network Address Translation (NAT)

Plus

No

Plus

Plus

NHRP

Yes

Yes

Yes

Yes

On Demand Routing (ODR)

Yes

Yes

Yes

Yes

OSPF

Yes

Yes

Yes

Yes

OSPF Not-So-Stubby-Areas (NSSA)

Yes

Yes

Yes

Yes

OSPF On Demand Circuit (RFC 1793)

Yes

Yes

Yes

Yes

PIM

Yes

Yes

Yes

Yes

Policy-based routing

Yes

Yes

Yes

Yes

RIP

Yes

Yes

Yes

Yes

RIP Version 2

Yes

Yes

Yes

Yes

Other Routing
AURP

No

No

Yes

Yes

IPX RIP

No

Yes

Yes

Yes

NLSP

No

Yes

Yes

Yes

RTMP

No

No

Yes

Yes

SMRP

No

No

Yes

Yes

SRTP

No

No

No

Yes

Multimedia and Quality of Service
Generic traffic shaping

Yes

Yes

Yes

Yes

Random Early Detection (RED)14

Yes

Yes

Yes

Yes

Resource Reservation Protocol (RSVP)14

Yes

Yes

Yes

Yes

Management
AutoInstall

Yes

Yes

Yes

Yes

Automatic modem configuration

Yes

Yes

Yes

Yes

HTTP Server

Yes

Yes

Yes

Yes

RMON events and alarms15

Yes

Yes

Yes

Yes

SNMP

Yes

Yes

Yes

Yes

Telnet

Yes

Yes

Yes

Yes

Security
Access lists

Yes

Yes

Yes

Yes

Access security

Yes

Yes

Yes

Yes

Extended access lists

Yes

Yes

Yes

Yes

Kerberized login

No

No

No

Yes

Kerberos V client support

No

No

No

Yes

Lock and key

Yes

Yes

Yes

Yes

MAC security for hubs

Yes

Yes

Yes

Yes

MD5 routing authentication

Yes

Yes

Yes

Yes

Router authentication and network layer encryption (40-bit or export controlled 56-bit DES)16

Encrypt

No

Encrypt

Encrypt

RADIUS

Yes

Yes

Yes

Yes

TACACS+17

Yes

Yes

Yes

Yes

IBM Support (Optional)
APPN (optional)2

No

Yes

No

Yes

BAN for SNA Frame Relay support

Plus

Yes

Plus

Yes

Bisync

Plus

Yes

Plus

Yes

Caching and filtering

Plus

Yes

Plus

Yes

DLSw+ 18

Plus

Yes

Plus

Yes

Downstream PU concentration (DSPU)

Plus

Yes

Plus

Yes

Frame Relay SNA support (RFC 1490)

Plus

Yes

Plus

Yes

Native Client Interface Architecture (NCIA) Server

Plus

Yes

Plus

Yes

NetView Native Service Point

Plus

Yes

Plus

Yes

QLLC

Plus

Yes

Plus

Yes

Response Time Reporter (RTR)

Plus

Yes

Plus

Yes

SDLC integration

Plus

Yes

Plus

Yes

SDLC transport (STUN)

Plus

Yes

Plus

Yes

SDLC-to-LAN conversion (SDLLC)

Plus

Yes

Plus

Yes

SNA and NetBIOS WAN optimization
via local acknowledgment

Plus

Yes

Plus

Yes

SRB/RSRB19

Plus

Yes

Plus

Yes

SRT

Plus

Yes

Plus

Yes

TG/COS

No

No

No

Yes

TN3270

No

No

No

Yes

Protocol Translation
LAT

No

No

No

Yes

Rlogin

No

No

No

Yes

Remote Node20
ARAP 1.0/2.021

No

No

Yes

Yes

Asynchronous master interfaces

Yes

Yes

Yes

Yes

ATCP

No

No

Yes

Yes

CPPP

Yes

Yes

Yes

Yes

CSLIP

Yes

Yes

Yes

Yes

DHCP

Yes

Yes

Yes

Yes

IP pooling

Yes

Yes

Yes

Yes

IPX and ARAP on virtual async interfaces

No

No

No

Yes

IPXCP12

No

Yes

Yes

Yes

MacIP

No

No

Yes

Yes

NASI

No

Yes

Yes

Yes

PPP

Yes

Yes

Yes

Yes

SLIP

Yes

Yes

Yes

Yes

Terminal Services20
LAT22

No

No

No

Yes

Rlogin

Yes

Yes

Yes

Yes

Telnet

Yes

Yes

Yes

Yes

TN3270

No

No

No

Yes

X.25 PAD

Yes

Yes

Yes

Yes

Xremote

No

No

No

Yes

1This feature set has no additional options. It offers a low-end APPN solution for this set of hardware platforms. This feature set is not available for AccessPro PC cards.
2Enterprise is available with APPN in a separate feature set. APPN includes APPN Central Registration (CRR) and APPN over DLSw+. APPN is not available on the AccessPro PC Card.
3This feature includes AppleTalk load balancing.
4IRB supports IP, IPX, and AppleTalk; it is supported for transparent bridging, but not for SRB; it is supported on all media-type interfaces except X.25 and ISDN bridged interfaces; and IRB and concurrent routing and bridging (CRB) cannot operate at the same time.
5The Novell IPX feature includes displaying SAP by name, IPX Access Control List violation logging, and plain-English IPX access lists.
6Translational bridging is fast switched by default but can be disabled.
7Note that the only IPX encapsulation supported in ISL is IEEE 802.3.
8ATM LAN emulation for Banyan VINES is only supported in Enterprise. The Desktop feature set supports DECnet only.
9ISDN support includes calling line identification (ANI), X.25 over the B channel, ISDN subaddressing, and applicable WAN optimization features.
10PPP includes support for LAN protocols supported by the feature set, address negotiation, PAP and CHAP authentication, Multilink PPP, and PPP compression.
11X.25 includes X.25 switching.
12IPX header compression (RFC 1553) is available in the feature sets that support IPX.
13BGP4 includes soft configuration, multipath support, and prefix filtering with inbound route maps.
14RED and RSVP are supported in IP/IPX/IBM/APPN for the Cisco 4000, Cisco 4500, and Cisco 4700 only.
15The RMON events and alarms groups are supported on all interfaces. Full RMON support is available with the Plus feature sets.
16For more details, see the description of the new data encryption options in the section "Cisco IOS Packaging" in the Release Notes for Cisco IOS Release 11.2. (See the "Related Documentation" section for information on accessing the related release notes.)
17TACACS+ Single Connection and TACACS+ SENDAUTH enhancements are supported.
18Cisco IOS Release 11.2 introduces several DLSw+ enhancements available in the Plus, Plus 40, and Plus 56 feature sets.
19SRB/RSRB is fast switched. This enhancement is on by default, but it can be disabled.
20These features are supported on access servers (with limited support on router auxiliary ports).
21The Cisco 4000, Cisco 4500, and Cisco 4700 products do not support ARAP 1.0/2.0.
22Use of LAT requires terminal license (FR-L8-10.X= for an 8-user license or FR-L16-10.X= for a 16-user license).

New and Changed Information

The following section lists the new hardware and software features supported by the Cisco 4000 series for Release 11.2.

New Features in Release 11.2(23)

There are no new features in Cisco IOS Release 11.2(23). Previous releases support features in the following categories:

Detailed descriptions of the features can be found on Cisco Connection Online or on the Documentation CD-ROM. See the "Obtaining Documentation" section for more details.

Important Notes

The following sections contain important notes about Cisco IOS Release 11.2 and apply to the Cisco 4000 series.

Release 11.2(15a) and 11.2(15a) P

After the release of Cisco IOS Release 11.2(15) and 11.2(15) P, a serious defect (caveat CSCdk33475) was identified that impacts Enhanced IGRP for Cisco IOS Releases 11.2(14.1) through 11.2(15.2) and Releases 11.2(14.1) P through 11.2(15.2) P. It was determined that this defect was significant enough to merit a software rebuild. The rebuild includes the caveat fix and is renumbered to 11.2(15a) and 11.2(15a) P.

Caveat CSCdk33475 causes a router to fail after the command show ip eigrp events is entered. While this show command is not required for normal operation, its use might present difficulties for customers who are running images with this defect.

Release 11.2(15a) and Release 11.2(15a) P and all subsequent releases of Cisco IOS software, including Release 11.2(16) and Release 11.2(16) P, include the fix for this caveat.

Cisco IOS Release 11.2 Switches to Long-Cycle Maintenance Releases

Beginning with Cisco IOS Release 11.2(15) and Release 11.2(15) P, all subsequent 11.2 and 11.2 P releases switch to Long-Cycle Maintenance Releases. A new 11.2 and 11.2 P maintenance release is scheduled to be available every thirteen weeks during the Long-Cycle Maintenance Release period. Interim builds will be available approximately every two weeks.

Caveats

Caveats describe unexpected behavior or defects in Cisco IOS software releases. Severity 1 caveats are the most serious caveats; severity 2 are less serious.

This section only contains open and resolved caveats for the current Cisco IOS maintenance release.

For information on caveats in Cisco IOS Release 11.2, see Cross-Platform Release Notes for Cisco IOS Release 11.2 located on CCO and the Documentation CD-ROM, that describes caveats affecting all maintenance releases.

Note If you have an account with CCO, you can use Bug Navigator II to find caveats of any severity for any release. You can reach Bug Navigator II on CCO at Software Center: Cisco IOS Software: Cisco Bug Toolkit: Cisco Bugtool Navigator II, or at http://www.cisco.com/support/bugtools.

Open Caveats for Release 11.2(23)

This section describes possibly unexpected behavior by Release 11.2(23) and describes only severity 1 and 2 caveats.

Access Server

Cisco AS2509-RJ serial 0 does not work when X-21 DCE cables are used.
The workaround is to use RS-449 DCE plus cable converter.

Basic System Services

A defect in multiple versions of Cisco IOS software will cause a Cisco router or switch to stop and reload if the Cisco IOS http service is enabled and an attempt is made to browse to http://<router-ip. This defect can be exploited to produce a denial of service (DoS) attack. This defect has been discussed on public mailing lists and should be considered public information.
The vulnerability, identified as Cisco bug ID CSCdr36952, affects virtually all mainstream Cisco routers and switches running Cisco IOS Release 11.1 through Release 12.1. The vulnerability has been corrected and Cisco is making fixed versions available to replace all affected Cisco IOS releases. Customers are urged to upgrade to releases that are not vulnerable to this defect.
Workaround: Nullify the vulnerability by disabling the Cisco IOS HTTP server, by preventing access to the port in use by the HTTP server on the affected router or switch, or by applying an access-class option to the service itself. The IOS HTTP server is not enabled by default except on a small number of router models in specific circumstances.
Please see http://www.cisco.com/warp/public/707/ioshttpserver-pub.shtml for the latest complete version of this security advisory.
Software forced reload after tacacs_plus invalid mallocs.
A configured explorer maxrate value is lost when the RSP reloads. It is replaced by the default maxrate value.
The following snmp-server view command works in Cisco IOS Release 11.1: 
    snmp-server view rping ciscoPingTable.*.* included
However, this command causes an error in Cisco IOS Release 11.2 or higher.

IBM Connectivity

When traversing a list of elements to be displayed in a show command, a list element that should display might be omitted from the list because it no longer exists in the ring. If the user has the command waiting on a -- More -- prompt for a long time, this list might change, and an attempt to print an element that existed previously but now has a NULL pointer will cause the router to crash. It is a rare occurrence and Cisco recommends one of the following workarounds to reduce the likelihood of a crash occurring:
The show buffer command indicates a large and increasing number of small buffers allocated. Dumping these packets indicates that they are SNA notify slu-disabled packets. The router is configured for APPN and dlsw.:wq.
An Advanced Peer-to-Peer Networking (APPN) router might experience a memory leak if you save the Routing Information Field during link activation. There is no workaround.
Several platforms are crashing with a bus error in Cisco IOS Release 11.2(15) and 11.2(15)P.
In a STUN-TG environment, with the router configured as STUN role secondary, the NCP (primary) may send RR without p/f bit set to acknowledge frames. From that point on, the router does not set the p/f bit. The result is that the primary has to wait for the T1 timer (REPLYTO) to expire before sending RR with p/f bit set.

Interfaces and Bridging

The FDDI interface driver can interact poorly with OSPF during OIR, causing SPF recalculations. This occurs only when OSPF is running on an FDDI interface that is not being inserted or removed. This fix eliminates the spurious indication from the driver that the SPF recalculation needs to take place.
A Cisco 7200 with PA-4R accepts a packet with an invalid FCS and passes it on to RSRB.
Note that the newer PA-4R-DTR does not have this problem.
Some multicast packets may be corrupted when bridged through an AS25xx router.
This works with Cisco IOS Release 10.3 but not with Release 11.1(24) or 11.2(20).

IP Routing Protocols

OSPF uses 1500 byte MTU size that cannot be changed on media that supports larger MTU sizes.
The same global inside address is used for three different inside hosts when using dynamic address translation in Cisco IOS Release 11.2(9).
EIGRP does not trigger the selection of a new route when one of the less desirable or equal paths is removed from the routing table. The route disappears, but no new route is selected from the topology table. There is no workaround.
IP access lists always permit IP fragments. There is no workaround.
A prefix that has been suppressed by map 1 but has been unsuppressed by map 2 might be advertised to the neighbor if the following lines are included in your configuration:
    router(config)# router bgp 109 
router(config-router)# neighbor 10.10.10.10 route-map map1 out 
router(config-router)# neighbor 10.10.10.10 unsuppress-map map2 
router(config-router)# exit
The workaround is to enter the suppress-map command with the aggregate-address command.
After a link flap, the summary route might not appear in the routing table although it appears in the OSPF topology table.
The workaround is to restart the OSPF process or reload the router.
Static route to null is not redistributed to EIGRP neighbors when there is also manual summarization configured on one of the interfaces for the same network and prefix-length.

ISO CLNS

Router can intermittently lose CLNS connectivity to directly connected ES neighbor. The workaround is to remove and reconfigure ESIS static adjacency.
Under certain conditions, a Cisco 7000 series running Cisco IOS Release 11.2(18) may corrupt CLNS packets received on an ATM interface. This happens only when the packets are fast switched.
The workaround is to turn off fast switching for CLNS packets.

LAT

LAT group code service filtering appears broken.

Miscellaneous

The show ver output on an RSP router with an HSA configuration fails to differentiate between a reload caused by a power-cycle on the router and a user-initiated reload. The router identified both situations with the following text string:
    System restarted by reload

In addition, if the reload failure is caused by the failure of Master RSP such that the router reloads using the former Slave RSP, then the failure cause from the master is not visible unless one looks at the show stack output. 





Packet OC-3 Interface Processor does not work with encryption GRE tunnel. There is no workaround. 





Unable to abort while waiting for a crypto key exchange in a Telnet session to the router.


There is a workaround to reloading the router until the problem is resolved. The session can be cleared in the following manner using show tcp bri followed by clear tcp tcb value.





A Cisco router configured to route IPX traffic through an encrypted tunnel interface might reset unexpectedly. There are two known workarounds to this problem:


no ipx route-cache




tunnel key key-number


where key-number is any number in the range 0-4294967295.


The tunnel key ID MUST match on each end of the tunnel. 







A Multiport Basic Rate Interface (MBRI) might pause indefinitely in "awaiting establishment" and "tei assigned" modes. Entering the clear interface bri interface number command establishes multiple frames on the port and allows another ISDN call to be made. There is no workaround. 





If Token Ring is the endpoint of an encrypted tunnel, extra packets are generated. Symptoms are a high CPU load (mainly taken by the Crypto Engine) and fictitious addresses when enabling the debug tunnel command.


The workaround is to use the interface command tunnel sequence-datagrams on both endpoints of the tunnel. 





Cisco 2500 series router using Cisco IOS Release 11.2 reloads when receiving data while running encryption.


There is no workaround. 





The router crashes because of a corruption of the memory. This is still under investigation. 




 Novell IPX, XNS, and Apollo Domain



There is a problem with IPX connectivity between FDDI and other interfaces (Serial and FastEthernet) since upgrading router from Release 10.3 to 11.2. Rconsole from client on FDDI ring fails to servers on Ethernet segments, either local or remote; nor can it browse NDS server object for those servers. Clients on remote Ethernet segment can Rconsole and browse FDDI servers. 


There is no workaround.




 Wide-Area Networking



Cisco 7200 series router running Release 11.1(20)CA1 are affected by a memory leak. 





On a router running Release 11.2 and doing inter-ELAN routing, if an ARP is received on an incorrect interface (that is, source IP address belonging to a subnet on another subinterface), the router will update its ARP table with incorrect information. Connectivity to that IP address in the correct subnet is then lost until that IP address sends out an ARP (on the correct subinterface). This problem is not present in Release 12.0.




 Resolved Caveats for Release 11.2(23)


 All of the caveats listed in this section are resolved in Release 11.2(23). This section only describes severity 1 and 2 caveats.


 IBM Connectivity



Router remains in stopping (5) state, while VTAM resources are in PDACP or PSUB1 states. DLUR receives +ve response from reqdactpu, but does not receive the dactpu from the dlus.


During a rare timing window when multiple downstream devices are simultaneously deactivated, the APPN router may hang the DLUR receive encapsulated message TP (which processes messages received on the conloser DLUR/DLUS pipe session). When the TP is hung, the DLUR may have some DLUR-PUs and DLUR-LUs that appear to be stuck in a stopping state. The corresponding VTAM resources remain in PDACP or PSUB1 states. The only workaround is to restart the APPN subsystem on the router. 





Memory alignment errors are evident in APPN code. 





A Cisco 4700 router configured for DLSW/DLUR and APPN crashed after show ver.


System restarted by error -a SegV exception.


The APPN router may reload with the following error and no stack trace during a link activation:


"System restarted by error - a SegV exception, PC 0x0 at 05:14:15"


The core file shows the following stack trace:


    #5 0x60702848 in xxxpcasm #4 0x60707a50 in pc_mainline #3 0x607065c8 in remote_path_control #2 0x607047b8 in process_create_tg #1 0x60757a88 in PDopen #0 0x0 in ?? () 





An Advanced Peer-to-Peer Networking/Dependent LU Requester (APPN/DLUR) router might reload with the following stack trace:


    RA: 0x60703538[h(0x6070345c)+0xdc] RA: 0x607038E0[fsm_receive_router (0x607035b0)+0x330] RA: 0x606E285C[upchuck(0x606e2654)+0x208] RA: 0x606E2348[rcv_cls_msg(0x606e2080)+0x2c8] RA: 0x606E1ED8[dlcdx_process_messages(0x606e1eb8)+0x20] RA: 0x607027D0[xxxpcasm(0x60702440)+0x390]



There is no workaround. 





If both a primary Dependent LU Server (DLUS) and a backup DLUS are configured on an Advanced Peer-to-Peer Networking/Dependent LU Requester (APPN/DLUR) router, the router might unnecessarily time out and allocate to one DLUS after having to time out and allocate to the other DLUS. When this situation occurs, you will receive an "allocate has an invalid rcb 0. Restart TP." message.


The workaround is to enter the prefer-active-dlus configuration command with the no retries operand. If you have prefer-active-dlus coded on the APPN control point with no retries, only the currently active DLUS will be retried. This is a temporary workaround. 




 IP Routing Protocols



Router might crash sometimes when show ip bgp and clear ip bgp * are entered simultaneously. This issue has been fixed. 




 Wide-Area Networking



Occasionally a VIP card might not respond to an RSP board request for a DBUS transaction. When this occurs, the RSP will reset the VIP interface and perform a cbus complex restart (to reallocate MEMD).


Cisco has a workaround for this problem. Please refer to the workaround enclosure. 





A Cisco 7507 router with an ATM Interface Processor (AIP) installed might reload with the following error and not come back up unless the AIP is removed:


    %DBUS-3-CXBUSERR: Slot 1, CBus Error %RSP-3-ERROR: CyBus0 error 10 %RSP-3-ERROR: command/address mismatch %RSP-3-ERROR: bus command write 4bytes (0xE) %RSP-3-ERROR: address offset (bits 3:1) 4 %RSP-3-ERROR: virtual address (bits 23:17) 000000



There is no workaround. 




 Related Documentation

 
 The following sections describe the documentation available for the Cisco 4000 series. These documents consist of hardware and software installation guides, Cisco IOS configuration and command references, system error messages, and other documents.


 Documentation is available as printed manuals or electronic documents.


 Use these release notes with these documents:



 Release-Specific Documents


 The following documents are specific to Release 11.2 and are located on CCO and the Documentation CD-ROM:



On CCO:


Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 11.2: Product Specific Release Notes for Cisco IOS Release 11.2: Cross-Platform Release Notes for Cisco IOS Release 11.2


On the Documentation CD-ROM:


Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 11.2: Product Specific Release Notes for Cisco IOS Release 11.2: Cross-Platform Release Notes for Cisco IOS Release 11.2





Technical Documents




 Platform-Specific Documents


 The following documents are specific to the Cisco 4000 series:



 On CCO at:


 Technical Documents: Documentation Home Page: Access Servers and Access Routers: Modular Access Routers: Cisco 4000 series


 On the Documentation CD-ROM at:


 Cisco Product Documentation: Access Servers and Access Routers: Modular Access Routers: Cisco 4000 series


 Cisco IOS Software Documentation Set


 The Cisco IOS software documentation set consists of the Cisco IOS configuration guides, Cisco IOS command references, and several other supporting documents, which are shipped with your order in electronic form on the Documentation CD-ROM---unless you specifically ordered the printed versions.


 Documentation Modules


 Each module in the Cisco IOS documentation set consists of two books: a configuration guide and a corresponding command reference. Chapters in a configuration guide describe protocols, configuration tasks, and Cisco IOS software functionality and contain comprehensive configuration examples. Chapters in a command reference provide complete command syntax information. Each configuration guide can be used with its corresponding command reference. 


 On CCO at:


 Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 11.2: Cisco IOS Release 11.2 Configuration Guides/Command References


 On the Documentation CD-ROM at:


 Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 11.2: Cisco IOS Release 11.2 Configuration Guides/Command References


 Release 11.2 Documentation Set


 Table 4 describes the contents of the Cisco IOS Release 11.2 software documentation set, which is available in electronic form and in printed form on request.







Note You can find the most current Cisco IOS documentation on CCO and the Documentation CD-ROM. These electronic documents may contain updates and modifications made after the paper documents were printed.




 On CCO at:


 Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 11.2


 On the Documentation CD-ROM at:


 Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 11.2


  

Table 4: Cisco IOS Software Documentation Set 




Books
Chapter Topics



  • Configuration Fundamentals Configuration Guide
    

  • Configuration Fundamentals Command Reference
    



 Configuration Fundamentals Overview
Cisco IOS User Interfaces
File Management
Interface Configuration
System Management




  • Network Protocols Configuration Guide, Part 1
    

  • Network Protocols Command Reference, Part 1
    



 IP Addressing
IP Services
IP Routing Protocols




  • Network Protocols Configuration Guide, Part 2
    

  • Network Protocols Command Reference, Part 2
    



 AppleTalk
Novell IPX




  • Network Protocols Configuration Guide, Part 3
    

  • Network Protocols Command Reference, Part 3
    



 Apollo Domain
Banyan VINES
DECnet
ISO CLNS
XNS




  • Wide-Area Networking Configuration Guide
    

  • Wide-Area Networking Command Reference
    



 ATM
Frame Relay
SMDS
X.25 and LAPB




  • Security Configuration Guide
    

  • Security Command Reference
    



 AAA Security Services
Security Server Protocols
Traffic Filtering
Network Data Encryption
Passwords and Privileges
Neighbor Router Authentication
IP Security Options




  • Dial Solutions Configuration Guide
    

  • Dial Solutions Command Reference
    



 Dial Business Solutions and Examples
Dial-In Port Setup
DDR and Dial Backup
Remote Node and Terminal Service
Cost-Control and Large-Scale Dial Solutions
VPDN




  • Cisco IOS Switching Services Configuration Guide
    

  • Cisco IOS Switching Services Command Reference
    



 Switching Paths for IP Networks
Fast Switching
Autonomous Switching
NetFlow Switching
Optimum Switching
Virtual LAN (VLAN) Switching and Routing
Inter-Switch Link Protocol Encapsulation
IEEE 802.10 Encapsulation
LAN Emulation




  • Bridging and IBM Networking Configuration Guide
    

  • Bridging and IBM Networking Command Reference
    



 Transparent Bridging
Source-Route Bridging
Remote Source-Route Bridging
DLSw+
STUN and BSTUN
LLC2 and SDLC
IBM Network Media Translation
DSPU and SNA Service Point
SNA Frame Relay Access Support
APPN
NCIA Client/Server Topologies
IBM Channel Attach




  • Cisco IOS Software Command Summary
    

  • Dial Solutions Quick Configuration Guide
    

  • System Error Messages
    

  • Debug Command Reference
    



 



















Note Cisco Management Information Base (MIB) User Quick Reference is no longer published. For the latest list of MIBs supported by Cisco, see Cisco Network Management Toolkit on Cisco Connection Online. From CCO, click on the following path: Software Center: Network Mgmt Products: Cisco Network Management Toolkit: Cisco MIB.




 Obtaining Documentation

 
 World Wide Web


 You can access the most current Cisco documentation on the World Wide Web at http://www.cisco.com,  http://www-china.cisco.com,  or http://www-europe.cisco.com.
  

 Documentation CD-ROM


 Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM is updated monthly. Therefore, it is probably more current than printed documentation. The CD-ROM package is available as a single unit or as an annual subscription.


 Ordering Documentation


 Registered CCO users can order the Documentation CD-ROM and other Cisco Product documentation through our online Subscription Services at http://www.cisco.com/cgi-bin/subcat/kaojump.cgi.
  

 Nonregistered CCO users can order documentation through a local account representative by calling Cisco's corporate headquarters (California, USA) at 408 526-4000 or, in North America, call 800 553-NETS (6387).


 Obtaining Technical Assistance

 
 Cisco provides Cisco Connection Online (CCO) as a starting point for all technical assistance. Warranty or maintenance contract customers can use the Technical Assistance Center. All customers can submit technical feedback on Cisco documentation using the web, e-mail, a self-addressed stamped response card included in many printed docs, or by sending mail to Cisco.


 Cisco Connection Online


 Cisco continues to revolutionize how business is done on the Internet. Cisco Connection Online is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information and resources at anytime, from anywhere in the world. This highly integrated Internet application is a powerful, easy-to-use tool for doing business with Cisco.


 CCO's broad range of features and services helps customers and partners to streamline business processes and improve productivity. Through CCO, you will find information about Cisco and our networking solutions, services, and programs. In addition, you can resolve technical issues with online support services, download and test software packages, and order Cisco learning materials and merchandise. Valuable online skill assessment, training, and certification programs are also available.


 Customers and partners can self-register on CCO to obtain additional personalized information and services. Registered users may order products, check on the status of an order and view benefits specific to their relationships with Cisco.


 You can access CCO in the following ways:



 You can e-mail questions about using CCO to cco-team@cisco.com.


 Technical Assistance Center


 The Cisco Technical Assistance Center (TAC) is available to warranty or maintenance contract customers who need technical assistance with a Cisco product that is under warranty or covered by a maintenance contract.


 To display the TAC web site that includes links to technical support information and software upgrades and for requesting TAC support, use www.cisco.com/techsupport.


 To contact by e-mail, use one of the following:


  



Language
E-mail Address



 English


 tac@cisco.com




 Hanzi (Chinese)


 chinese-tac@cisco.com




 Kanji (Japanese)


 japan-tac@cisco.com




 Hangul (Korean)


 korea-tac@cisco.com




 Spanish


 tac@cisco.com




 Thai


 thai-tac@cisco.com














 In North America, TAC can be reached at 800 553-2447 or 408 526-7209. For other telephone numbers and TAC e-mail addresses worldwide, consult the following web site: http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml.
  

 Documentation Feedback


 If you are reading Cisco product documentation on the World Wide Web, you can submit technical comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco.


 You can e-mail your comments to bug-doc@cisco.com.


 To submit your comments by mail, for your convenience many documents contain a response card behind the front cover. Otherwise, you can mail your comments to the following address:


 Cisco Systems, Inc.
Document Resource Connection
170 West Tasman Drive
San Jose, CA 95134-9883


 We appreciate and value your comments


 


  
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Posted: Fri Jul  7 10:24:18 PDT 2000

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