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Concatenation is now configurable. You can turn it on or off.
Some modems experience problems when concatenation is enabled. This feature allows you to prevent concatenation-related problems by allowing you to turn it off.
This feature is not supported on the MC11 modem card as the MC11 does not support concatenation.
Table 1 lists the IOS cable router features released in the IOS 12.0 timeframe.
| Available With: | Category | Feature |
|---|---|---|
11.3(5)NA & 12.0(3)T | Cable Features | Feature Enhancements |
11.3(6)NA |
| MC16 Modem Card |
11.3(8)NA |
| Access List Support Enhancements |
12.0(4)T |
| Downstream Channel ID Configuration |
12.0(4)T |
| Multiple Service ID Support |
12.0(4)T |
| Cable Modem and Host Subnet Addressing |
12.0(5)T |
| Telephone Return |
12.0(5)T |
| Time Server Functionality |
12.0(7)T |
| Amplitude Averaging Compensation |
12.0(7)XR |
| Cable Interface Bundling |
12.0(7)XR |
| Enhanced Modem Status Display |
12.0(7)XR |
| Show Interface Cable Command Verbose Enhancements |
12.0(7)XR |
| IP Address Verification |
12.0(7)XR |
| Registration Timeout Configuration |
12.0(7)XR |
| Show Cable Modem Command Enhancements |
12.0(7)XR |
| Modem Status Summary Enhancements |
12.0(7)XR |
| Show Controller Command Enhancements |
12.0(7)XR |
| Configuring Concatenation |
12.0(7)XR |
| Virtual Private Network Support |
12.0(7)XR |
| Blind Hopping Support on the MC16S Modem Card |
12.0(7)XR |
| Signal-to-Noise Ratio Data Support |
11.3(9)NA and 12.0(4)T | Cable QoS | QoS Profile Enforcement |
12.0(4)T |
| Quality of Service for Voice |
11.3(9)NA | Network Management | Upstream Traffic Shaping Feature |
12.0(5)T |
| Enhanced-Spectrum Management |
12.0(5)T |
| Downstream Rate Shaping with TOS bits |
12.0(7)XR |
| Spectrum Management Using the MC16S Modem Card |
12.0(7)XR |
| Downstream Test Signals Configuration |
12.0(7)XR | Wireless Features | Point-to-Point Wireless Support |
The uBR7200 series cable router is described in Voice, Video, and Home Applications Configuration Guide for Cisco IOS Release 12.0 and in the following online feature modules:
uBR7200 series cable router
No new or modified standards are supported by this feature.
No new or modified MIBs are supported by this feature.
No new or modified RFCs are supported by this feature.
| Step | Command | Purpose | ||
|---|---|---|---|---|
| Router(config-if)# cable upstream n concatenation | Turns on concatenation on the specified channel. | ||
| Router(config-if)# no cable upstream n concatenation | Turns off concatenation on the specified channel. |
| Command | Purpose |
|---|---|
Router# show controller cable slot/port | Displays the current status of concatenation for the specified slot and port. |
The following example indicates (in bold) that concatenation is turned off.
Lab-CMTS#show controller cab 3/0
Interface Cable3/0
Hardware is BCM3210 FPGA
idb 0x6182BE18 MAC regs 0x3D900000 PLX regs 0x3D800000
rx ring entries 1024 tx ring entries 128 MAP tx ring entries 128
Rx ring 0x4B09A400 shadow 0x61849408 head 359
Tx ring 0x4B09C440 shadow 0x6184A478 head 85 tail 85 count 0
MAP Tx ring 0x4B09C880 shadow 0x6184A8E8 head 7 tail 7 count 0
MAP timer sourced from slot 4
throttled 0 enabled 0 disabled 0
Rx: spurious 341 framing_err 0 hcs_err 2 no_buffer 0 short_pkt 2
no_enqueue 0 no_enp 1 miss_count 0 latency 16
invalid_sid 0 invalid_mac 0 bad_ext_hdr_pdu 0 concat 0 bad-concat 0
Tx: full 0 drop 0 stuck 0 latency 1
MTx: full 0 drop 0 stuck 0 latency 9
Slots 68056 NoUWCollNoEngy 15 FECorHCS 2 HCS 0
Req 1803579865 ReqColl 1 ReqNoise 276120 ReqNoEnergy 0
ReqData 0 ReqDataColl 0 ReqDataNoise 0 ReqDataNoEnergy 0
Rng 143099 RngColl 0 RngNoise 3891
FECBlks 0 UnCorFECBlks 0 CorFECBlks 0
MAP FIFO overflow 0, Rx FIFO overflow 0, No rx buf 0
DS FIFO overflow 0, US FIFO overflow 0, US stuck 0
Bandwidth Requests= 0xFFC9
Piggyback Requests= 0xA1D
Ranging Requests= 0x22039
Timing Offset = 0x0
Bad bandwidth Requests= 0x31BC
No MAP buffer= 0x0
Cable3/0 Downstream is up
Frequency not set, Channel Width 6 MHz, 64-QAM, Symbol Rate 5.056941 Msps
FEC ITU-T J.83 Annex B, R/S Interleave I=32, J=4
Downstream channel ID: 0
Cable3/0 Upstream 0 is up
Frequency 20.208 MHz, Channel Width 1.600 MHz, QPSK Symbol Rate 1.280 Msps
Spectrum Group is overridden
SNR - Unknown
Nominal Input Power Level 0 dBmV, Tx Timing Offset 4667
Ranging Backoff automatic (Start 0, End 3)
Ranging Insertion Interval automatic (60 ms)
Tx Backoff Start 0, Tx Backoff End 4
Modulation Profile Group 1
Concatenation is disabled
part_id=0x3136, rev_id=0x05, rev2_id=0x64
nb_agc_thr=0x3000, nb_agc_nom=0x0000
Range Load Reg Size=0x58
Request Load Reg Size=0x0E
Minislot Size in number of Timebase Ticks is = 8
Minislot Size in Symbols = 64
Bandwidth Requests = 0xFFD0
Piggyback Requests = 0xA1D
Invalid BW Requests= 0x31BC
Minislots Requested= 0x1A21F3
Minislots Granted = 0x1A21F3
Minislot Size in Bytes = 16
Map Advance = 4000 usecs
UCD Count = 46643
To turn concatenation on or off, use the cable upstream concatenating interface configuration command. To turn off concatenation, use the no form of this command.
cable upstream n concatenation
n | Specifies the upstream channel. |
Enabled
Interface configuration
| Release | Modification |
|---|---|
12.0(7)XR | This command was introduced. |
Since the MC11 modem card does not support concatenation, this command is not supported on this card. Concatenation is always disabled for the MC11 modem card.
Posted: Tue Jan 25 12:36:12 PST 2000
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