03-26-2009 06:14 AM - edited 03-04-2019 04:06 AM
Hi,
I have multiple uBR7246VXR and uBR10000 CMMTs.
If I compare show interfaces cable x/y and show interfaces cable x/y downstream I can see that there are output drops and discards on uBR7246VXR while on uBR10000 there are none?
How is so that identically configured interfaces with similar traffic patterns on one type of device have discards and dont have on another type of device?
**********************ON uBR7246VXR
------------------ show interface Cable5/0 downstream ------------------
Cable5/0: Downstream is up, IF output is up
2795513120 packets output, 3881130640 bytes, 24085848 discarded
0 output errors
1386 total active devices, 560 active modems
Total downstream bandwidth: 55616 Kbps
Total downstream reserved/reservable bandwidth: 1220/44492 Kbps
Estimated usable bandwidth: 50000 Kbps
Worst case latency for low latency queue: 0 usecs
Current Upper limit for worst case latency: 0 usecs
Ranging lists counts
Maintenance list 560, max 573
Continuous list 0, max 23
Pending list 0, max 4
------------------ show interface Cable5/0 ------------------
Cable5/0 is up, line protocol is up
Hardware is UBR7200 CLC, address is 0014.f1e1.288c (bia 0014.f1e1.288c)
MTU 1500 bytes, BW 50000 Kbit, DLY 1000 usec,
reliability 255/255, txload 126/255, rxload 39/255
Encapsulation MCNS, loopback not set
Keepalive set (10 sec)
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:01:13, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/81968/0 (size/max/drops/flushes); Total output drops: 63940767
Queueing strategy: fifo
Output queue: 0/40 (size/max)
30 second input rate 7815000 bits/sec, 3175 packets/sec
30 second output rate 24870000 bits/sec, 3881 packets/sec
1654211126 packets input, 3990133477 bytes, 10401965 no buffer
Received 104151143 broadcasts, 0 runts, 0 giants, 0 throttles
10853730 input errors, 8911838 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
3815858662 packets output, 3833475349 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 output buffer failures, 0 output buffers swapped out
**********************ON uBR10k
------------------ show interface Cable6/0/0 ------------------
Cable6/0/0 is up, line protocol is up
Hardware is UBR10000 CLC, address is 0021.d8d1.b248 (bia 0021.d8d1.b248)
MTU 1500 bytes, BW 50000 Kbit, DLY 1000 usec,
reliability 255/255, txload 93/255, rxload 28/255
Encapsulation MCNS, loopback not set
Keepalive set (10 sec)
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:14:38, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: PXF First-In-First-Out
Output queue 0/64, 0 drops; input queue 0/75, 0 drops
30 second input rate 5542000 bits/sec, 2084 packets/sec
30 second output rate 18430000 bits/sec, 2588 packets/sec
4256419649 packets input, 2453722043 bytes, 3376154 no buffer
Received 26835452 broadcasts, 0 runts, 0 giants, 0 throttles
286592 input errors, 210527 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
3178709048 packets output, 1539587948 bytes, 0 underruns
0 output errors, 0 collisions, 7 interface resets
0 output buffer failures, 0 output buffers swapped out
------------------ show interface Cable6/0/0 downstream ------------------
Cable6/0/0: Downstream is up, IF output is up
2157585379 packets output, 3610803754 bytes, 0 discarded
0 output errors
914 total active devices, 366 active modems
Total downstream bandwidth: 55616 Kbps
Total downstream reserved/reservable bandwidth: 610/44492 Kbps
Estimated usable bandwidth: 50000 Kbps
03-26-2009 06:16 AM
Here are interface configurations:
*********************ON uBR7246VXR
interface Cable5/0
no ip address
load-interval 30
cable tftp-enforce
no cable packet-cache
cable bundle 2
cable downstream channel-id 122
cable downstream rate-limit token-bucket
cable downstream annex A
cable downstream modulation 256qam
cable downstream frequency 402000000
no cable downstream rf-shutdown
cable downstream rf-power 57
cable upstream max-ports 4
cable upstream 0 connector 0
cable upstream 0 frequency 58888000
cable upstream 0 ingress-noise-cancellation 200
cable upstream 0 docsis-mode tdma
cable upstream 0 channel-width 3200000 3200000
cable upstream 0 minislot-size 2
cable upstream 0 threshold snr-profiles 20 13
cable upstream 0 power-level 0
cable upstream 0 range-backoff 3 6
cable upstream 0 modulation-profile 42 41
cable upstream 0 rate-limit
no cable upstream 0 shutdown
cable upstream 1 description Divkovica SP0102
cable upstream 1 connector 1
cable upstream 1 frequency 58888000
cable upstream 1 ingress-noise-cancellation 200
cable upstream 1 docsis-mode tdma
cable upstream 1 channel-width 3200000 3200000
cable upstream 1 minislot-size 2
cable upstream 1 threshold snr-profiles 20 13
cable upstream 1 power-level 0
cable upstream 1 range-backoff 3 6
cable upstream 1 modulation-profile 42 41
no cable upstream 1 shutdown
cable upstream 2 description Bolnicka SP0401
cable upstream 2 connector 2
cable upstream 2 frequency 58888000
cable upstream 2 ingress-noise-cancellation 200
cable upstream 2 docsis-mode tdma
cable upstream 2 channel-width 3200000 3200000
cable upstream 2 minislot-size 2
cable upstream 2 threshold snr-profiles 20 13
cable upstream 2 power-level 0
cable upstream 2 range-backoff 3 6
cable upstream 2 modulation-profile 42 41
no cable upstream 2 shutdown
cable upstream 3 description Krizmanova SP0204
cable upstream 3 connector 3
cable upstream 3 frequency 58888000
cable upstream 3 ingress-noise-cancellation 200
cable upstream 3 docsis-mode tdma
cable upstream 3 channel-width 3200000 3200000
cable upstream 3 minislot-size 2
cable upstream 3 power-level 0
cable upstream 3 range-backoff 3 6
cable upstream 3 modulation-profile 41
no cable upstream 3 shutdown
pppoe enable
*********************ON uBR10k
interface Cable6/0/0
no ip address
load-interval 30
cable tftp-enforce
cable shared-secret 7
no cable packet-cache
cable bundle 3
cable downstream channel-id 140
cable downstream annex A
cable downstream modulation 256qam
cable downstream frequency 402000000
no cable downstream rf-shutdown
cable downstream rf-power 50
cable upstream max-ports 4
cable upstream 0 connector 0
cable upstream 0 frequency 58888000
cable upstream 0 docsis-mode tdma
cable upstream 0 channel-width 3200000 3200000
cable upstream 0 minislot-size 2
cable upstream 0 range-backoff 3 6
cable upstream 0 modulation-profile 21
cable upstream 0 rate-limit
no cable upstream 0 shutdown
cable upstream 1 connector 1
cable upstream 1 frequency 58888000
cable upstream 1 docsis-mode tdma
cable upstream 1 channel-width 3200000 3200000
cable upstream 1 minislot-size 2
cable upstream 1 range-backoff 3 6
cable upstream 1 modulation-profile 21
cable upstream 1 rate-limit
no cable upstream 1 shutdown
cable upstream 2 connector 2
cable upstream 2 frequency 58888000
cable upstream 2 docsis-mode tdma
cable upstream 2 channel-width 3200000 3200000
cable upstream 2 minislot-size 2
cable upstream 2 range-backoff 3 6
cable upstream 2 modulation-profile 21
cable upstream 2 rate-limit
no cable upstream 2 shutdown
cable upstream 3 connector 3
cable upstream 3 frequency 58888000
cable upstream 3 docsis-mode tdma
cable upstream 3 channel-width 3200000 3200000
cable upstream 3 minislot-size 2
cable upstream 3 range-backoff 3 6
cable upstream 3 modulation-profile 21
cable upstream 3 rate-limit
no cable upstream 3 sh
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