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This section describes how to configure the Cisco AccessPath-VS3 Packet Telephony Concentrator for the following backhaul interfaces (also shown with the minimum configuration statements for each interface):
| Backhaul Interface | Minimum Configuration |
|---|---|
Fast Ethernet | |
High-Speed Serial Interface (HSSI) | |
Synchronous serial (serial) | |
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Assign an IP address to the backhaul interface of your Router Shelf so that it can be recognized as a device on your particular network. The Fast Ethernet interface supports 100-Mbps speeds with the 100BaseT hubs and switches. The commands to configure for HSSI and synchronous serial interfaces are very similar.
The above examples configure the interfaces for standard Cisco High-Level Data Link Control (HDLC) encapsulation. Another common type of serial configuration is Frame Relay. For more information on configuring for the Frame Relay interface, see the Cisco IOS configuration guide and command reference publications. These publications are available on the Documentation CD-ROM that shipped with your AccessPath-VS3 system, on the World Wide Web from Cisco's home page, or you can order printed copies.
| Step | Command | Purpose |
|---|---|---|
| 1 | | Enter enable mode. Enter the password. You have entered enable mode when the prompt changes to |
| 2 | | Enter global configuration mode. You have entered global configuration mode when the prompt changes to |
| 3 | [or] [or] | Enter Fast Ethernet interface configuration mode for a specific slot/port.
Enter Synchronous Serial interface configuration mode for a specific slot/port. |
| 4 | | Assign an IP address and subnet mask to the interface. |
| 51 | [or] | Sets Fast Ethernet to operate at full duplex. Sets Fast Ethernet to operate at half duplex. This is the default value. |
| 6 | | Return to privileged EXEC mode.
This message is normal and does not indicate an error. |
| 1Do this step for the Fast Ethernet interface only. |
To verify the IP address on any backhaul interface:
RS01# show arp
Protocol Address Age (min) Hardware Addr Type Interface Internet 192.168.2.1 _ 0800.207e.bead ARPA FastEthernet2/0
To verify the configured speed on the Fast Ethernet interface:
RS01# show interface fastethernet 2/0
FastEthernet2/0 is up, line protocol is up Hardware is DEC21140, address is 00e0.1e3e.c125 (bia 00e0.1e3e.c125) Internet address is 2.2.2.2/8 MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec, rely 255/255, load 2/255 Encapsulation ARPA, loopback not set, keepalive set (10 sec), auto duplex, 100BaseTX/FX, 100Mb/s
To verify the actual speed or duplex operation on the Fast Ethernet interface:
RS01# show controller fastethernet 2/0
DEC21140 Setup Frame (0) 00e0.1e3e.c125 (1) 0100.0ccc.cccc dec21140_ds=0x606A0078, registers=0x3C210000, ib=0x4002F75C, ring entries=128 rxring=0x4002F844, rxr shadow=0x606F5168, rx_head=47, rx_tail=47 txring=0x4003006C, txr shadow=0x606F5388, tx_head=63, tx_tail=63, tx_count=0 tx_size=128, rx_size=128 PHY link up Duplex mode sensed by auto-negotiation is half-duplex and Fast Ethernet speed is 100 Mbps.
To verify the configured duplex operation on the Fast Ethernet interface:
RS01# show interface fastethernet 2/0
FastEthernet2/0 is up, line protocol is up Hardware is DEC21140, address is 00e0.1e3e.c125 (bia 00e0.1e3e.c125) Internet address is 2.2.2.2/8 MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec, rely 255/255, load 2/255 Encapsulation ARPA, loopback not set, keepalive set (10 sec), auto duplex, 100BaseTX/FX, auto speed ^^^^^^^^^^^
| Tips |
If you are having trouble:
For the Fast Ethernet interface only:
The configuration statements for the Frame Relay interface, provided at the beginning of this chapter, have the following caveats:
1. The configuration does not address any of the routing protocol issues associated with Frame Relay.
2. It relies on the Cisco IOS Release 11.2 lmi auto-sense feature to determine the appropriate Local Management Interface (LMI) to use.
3. It relies on Inverse Address Resolution Protocol (Inverse ARP) to map IP addresses to data-link connection identifiers (DLCIs) in the Frame Relay network.
4. It does not use Internet Engineering Task Force (IETF) encapsulation, so it would communicate only with Cisco devices.
This section provides procedures for configuring the AccessPath-VS3 system to use the following routing protocols on the Router Shelf backhaul:
OSPF is always used internally, but the backhaul can be configured for Static, EIGRP, or OSPF protocols.
| Step | Command | Purpose |
|---|---|---|
| 1 | | Enter enable mode. Enter the password. You have entered enable mode when the prompt changes to |
| 2 | | Enter global configuration mode. You have entered global configuration mode when the prompt changes to |
| 3 | | Configure a static default route to router 192.168.2.254. |
| 4 | | (Optional) Configure a duplicate static default to router 192.168.2.253. |
| 5 | |
To verify the routing information:
In the procedure to configure an EIGRP backhaul shown in Table 6-3, a backhaul interface in network 192.168.2.0 has already been configured, and the backhaul network uses EIGRP.
| Step | Command | Purpose |
|---|---|---|
| 1 | | Enter enable mode. Enter the password. You have entered enable mode when the prompt changes to RS01#. |
| 2 | | Enter global configuration mode. You have entered global configuration mode when the prompt changes to RS01(config)#. |
| 3 | | Configure another EIGRP routing process. The process number must match the number used in the customer's EIGRP AS. |
| 4 | | Configure the network statements for the backhaul IP network(s) for the backhaul EIGRP process. |
| 5 |
| Configure mutual redistribution between the two OSPF area processes. |
| 6 | | Return to enable mode. |
In the procedure to configure an OSPF backhaul shown in Table 6-3:
| Step | Command | Purpose |
|---|---|---|
| 1 | | Enter enable mode. Enter the password. You have entered enable mode when the prompt changes to |
| 2 | | Enter global configuration mode. You have entered global configuration mode when the prompt changes to |
| 3 | | Configure an OSPF routing process. The process number must not match the number used in the customer's OSPF domain. |
| 4 | | Configure the network statements for the backhaul IP network(s) for the backhaul OSPF process. The area number must match the area of the connected network. |
| 5 | | Configure mutual redistribution between the OSPF and EIGRP domains. |
| 6 | | Return to enable mode. |
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