So .. I have like .. tons of errors on input/output on the FA interface .. also input errors on the cable interfaces .. and same thing on the catalyst switch to which 2 VXR's are connected... the FA's in the ubr's are in halfduplex mode because they'd work like crap if in full duplex .. I think because it wouldn't face the traffic ?:| .. currently I have 2 ubr's with the cable interfaces ( with 6 upstreams ) all of them having > 50 && < 200 users .. ( I could post real numbers if needed ) ... what should I paste to help ya' guys help me figure out what the heck is wrong and fix the errors/collisions and make the card work in fullduplex .. and also fix the high cpu usage ( ubr's are only used to translate from cable to fa .. nothing else.. ) ..
Thanks in advance,
Adrian.
replace the cable, manually set speed, duplex(full!) and disable crossover detection functions on both sides.
That should at least get over the fa errors .. I doubt it'll get rid of the cable interface errors ...
CmtsNEW#show interfaces fastEthernet 0/0
FastEthernet0/0 is up, line protocol is up
Hardware is DEC21140A, address is 0005.9ad3.6800 (bia 0005.9ad3.6800)
Internet address is 10.201.0.2/24
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 240/255, txload 13/255, rxload 104/255
Encapsulation ARPA, loopback not set
Keepalive not set
Half-duplex, 100Mb/s, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/3/1013 (size/max/drops/flushes); Total output drops: 1452465
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 40946000 bits/sec, 4463 packets/sec
5 minute output rate 5440000 bits/sec, 2825 packets/sec
3023590052 packets input, 1440844051 bytes
Received 1346252 broadcasts, 0 runts, 0 giants, 1 throttles
13161817 input errors, 0 CRC, 0 frame, 0 overrun, 13133979 ignored
0 watchdog
0 input packets with dribble condition detected
3017639487 packets output, 1595164384 bytes, 0 underruns
1899035723 output errors, 1419911281 collisions, 60320 interface resets
0 babbles, 0 late collision, 0 deferred
14496 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
CmtsNEW#show interfaces cable 6/0
Cable6/0 is up, line protocol is up
Hardware is BCM3210 ASIC, address is 0005.9ad3.68a8 (bia 0005.9ad3.68a8)
Internet address is 10.202.0.254/20
MTU 1500 bytes, BW 37500 Kbit, DLY 1000 usec,
reliability 255/255, txload 141/255, rxload 20/255
Encapsulation MCNS, loopback not set
Keepalive set (10 sec)
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 1/75/272/0 (size/max/drops/flushes); Total output drops: 3553876
Queueing strategy: weighted fair
Output queue: 0/1000/64/3553847 (size/max total/threshold/drops)
Conversations 0/4/256 (active/max active/max total)
Reserved Conversations 9/9 (allocated/max allocated)
Available Bandwidth 28125 kilobits/sec
5 minute input rate 2968000 bits/sec, 1477 packets/sec
5 minute output rate 20858000 bits/sec, 2266 packets/sec
1806229477 packets input, 959338065 bytes, 654 no buffer
Received 85683636 broadcasts, 0 runts, 1362 giants, 0 throttles
10713727 input errors, 1079534 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
4157612107 packets output, 277494326 bytes, 0 underruns
0 output errors, 0 collisions, 3 interface resets
0 output buffer failures, 0 output buffers swapped out
CmtsNEW#show interfaces cable 4/0
Cable4/0 is up, line protocol is up
Hardware is BCM3210 ASIC, address is 0005.9ad3.6870 (bia 0005.9ad3.6870)
Internet address is 10.12.0.254/20
MTU 1500 bytes, BW 37500 Kbit, DLY 1000 usec,
reliability 255/255, txload 132/255, rxload 17/255
Encapsulation MCNS, loopback not set
Keepalive set (10 sec)
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/345/0 (size/max/drops/flushes); Total output drops: 5160433
Queueing strategy: weighted fair
Output queue: 0/1000/64/5160418 (size/max total/threshold/drops)
Conversations 0/4/256 (active/max active/max total)
Reserved Conversations 9/9 (allocated/max allocated)
Available Bandwidth 28125 kilobits/sec
5 minute input rate 2510000 bits/sec, 1373 packets/sec
5 minute output rate 19475000 bits/sec, 2155 packets/sec
1470777507 packets input, 4048857598 bytes, 408 no buffer
Received 65557582 broadcasts, 0 runts, 555 giants, 0 throttles
5286683 input errors, 2430 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
3177384089 packets output, 56153614 bytes, 0 underruns
0 output errors, 0 collisions, 3 interface resets
0 output buffer failures, 0 output buffers swapped out
-- My wish ... --
Correct, that should fix the Fa int.
No output errors on cable interfaces so problem lies with upstream channels - chceck SNR/Modulation and correctable and uncorrectable error counts -> sh int cable X/Y upstream Z
sh controllers cable X/Y upstream Z
CmtsNEW#sh int cable 6/0 upstream 0
Cable6/0: Upstream 0 is up
Received 11481648 broadcasts, 2540040 multicasts, 1584224717 unicasts
0 discards, 114556561 errors, 3027206 unknown protocol
1598246405 packets input, 6672448 uncorrectable
104099529 noise, 0 microreflections
Total Modems On This Upstream Channel : 123 (73 active)
CmtsNEW#sh int cable 6/0 upstream 1
Cable6/0: Upstream 1 is up
Received 15655493 broadcasts, 2294576 multicasts, 2144275748 unicasts
0 discards, 89123964 errors, 1945241 unknown protocol
2162225817 packets input, 2370751 uncorrectable
85876966 noise, 0 microreflections
Total Modems On This Upstream Channel : 76 (44 active)
CmtsNEW#sh int cable 6/0 upstream 2
Cable6/0: Upstream 2 is up
Received 17229733 broadcasts, 4817722 multicasts, 2422096127 unicasts
0 discards, 194704235 errors, 3293928 unknown protocol
2444143584 packets input, 1579616 uncorrectable
191868346 noise, 0 microreflections
Total Modems On This Upstream Channel : 98 (63 active)
CmtsNEW#sh int cable 6/0 upstream 3
Cable6/0: Upstream 3 is up
Received 25717600 broadcasts, 5773354 multicasts, 2604206947 unicasts
0 discards, 160457477 errors, 4101959 unknown protocol
2635697901 packets input, 1145050 uncorrectable
158588707 noise, 0 microreflections
Total Modems On This Upstream Channel : 132 (82 active)
CmtsNEW#sh int cable 6/0 upstream 4
Cable6/0: Upstream 4 is up
Received 4553785 broadcasts, 175667 multicasts, 603961721 unicasts
0 discards, 6454149 errors, 344952 unknown protocol
608691173 packets input, 55037 uncorrectable
4737674 noise, 0 microreflections
Total Modems On This Upstream Channel : 15 (10 active)
CmtsNEW#sh int cable 6/0 upstream 5
Cable6/0: Upstream 5 is up
Received 8101199 broadcasts, 192688 multicasts, 493065456 unicasts
0 discards, 11827049 errors, 160428 unknown protocol
501359343 packets input, 1624252 uncorrectable
8976401 noise, 0 microreflections
Total Modems On This Upstream Channel : 39 (0 active)
CmtsNEW#sh contr
CmtsNEW#sh controllers cable
CmtsNEW#sh controllers cable 6/0 up
CmtsNEW#sh controllers cable 6/0 upstream 0
Cable6/0 Upstream 0 is up
Frequency 25.008 MHz, Channel Width 0.400 MHz, QPSK Symbol Rate 0.320 Msps
Spectrum Group is overridden
US phy SNR_estimate for good packets - 21.5589 dB
Nominal Input Power Level 0 dBmV, Tx Timing Offset 1983
Ranging Backoff automatic (Start 0, End 3)
Ranging Insertion Interval automatic (354 ms)
Tx Backoff Start 3, Tx Backoff End 5
Modulation Profile Group 1
Concatenation is enabled
Fragmentation is enabled
part_id=0x3137, rev_id=0x03, rev2_id=0xFF
nb_agc_thr=0x0000, nb_agc_nom=0x0000
Range Load Reg Size=0x58
Request Load Reg Size=0x0E
Minislot Size in number of Timebase Ticks is = 32
Minislot Size in Symbols = 64
Bandwidth Requests = 0x22CC7BD1
Piggyback Requests = 0x1B6561
Invalid BW Requests= 0x6652E
Minislots Requested= 0x62B93F5F
Minislots Granted = 0x2440A9BD
Minislot Size in Bytes = 16
Map Advance (Dynamic) : 2073 usecs
UCD Count = 2377074
CmtsNEW#sh controllers cable 6/0 upstream 1
Cable6/0 Upstream 1 is up
Frequency 25.008 MHz, Channel Width 0.800 MHz, QPSK Symbol Rate 0.640 Msps
Spectrum Group is overridden
US phy SNR_estimate for good packets - 30.333 dB
Nominal Input Power Level 0 dBmV, Tx Timing Offset 2076
Ranging Backoff automatic (Start 0, End 3)
Ranging Insertion Interval automatic (354 ms)
Tx Backoff Start 3, Tx Backoff End 5
Modulation Profile Group 1
Concatenation is enabled
Fragmentation is enabled
part_id=0x3137, rev_id=0x03, rev2_id=0xFF
nb_agc_thr=0x0000, nb_agc_nom=0x0000
Range Load Reg Size=0x58
Request Load Reg Size=0x0E
Minislot Size in number of Timebase Ticks is = 16
Minislot Size in Symbols = 64
Bandwidth Requests = 0x2DC056A6
Piggyback Requests = 0x389C
Invalid BW Requests= 0x4086
Minislots Requested= 0xF2174A86
Minislots Granted = 0x2EFD4C92
Minislot Size in Bytes = 16
Map Advance (Dynamic) : 2082 usecs
UCD Count = 2377075
CmtsNEW#sh controllers cable 6/0 upstream 2
Cable6/0 Upstream 2 is up
Frequency 25.008 MHz, Channel Width 0.800 MHz, QPSK Symbol Rate 0.640 Msps
Spectrum Group is overridden
US phy SNR_estimate for good packets - 22.9115 dB
Nominal Input Power Level -10 dBmV, Tx Timing Offset 1821
Ranging Backoff automatic (Start 0, End 3)
Ranging Insertion Interval automatic (354 ms)
Tx Backoff Start 3, Tx Backoff End 5
Modulation Profile Group 1
Concatenation is enabled
Fragmentation is enabled
part_id=0x3137, rev_id=0x03, rev2_id=0xFF
nb_agc_thr=0x0000, nb_agc_nom=0x0000
Range Load Reg Size=0x58
Request Load Reg Size=0x0E
Minislot Size in number of Timebase Ticks is = 16
Minislot Size in Symbols = 64
Bandwidth Requests = 0x357C3993
Piggyback Requests = 0x509890
Invalid BW Requests= 0xE7D4
Minislots Requested= 0xFE8C57B5
Minislots Granted = 0x375B931D
Minislot Size in Bytes = 16
Map Advance (Dynamic) : 2057 usecs
UCD Count = 2377088
CmtsNEW#sh controllers cable 6/0 upstream 3
Cable6/0 Upstream 3 is up
Frequency 25.008 MHz, Channel Width 0.800 MHz, QPSK Symbol Rate 0.640 Msps
Spectrum Group is overridden
US phy SNR_estimate for good packets - 22.8342 dB
Nominal Input Power Level 0 dBmV, Tx Timing Offset 1262
Ranging Backoff automatic (Start 0, End 3)
Ranging Insertion Interval automatic (354 ms)
Tx Backoff Start 3, Tx Backoff End 5
Modulation Profile Group 1
Concatenation is enabled
Fragmentation is enabled
part_id=0x3137, rev_id=0x03, rev2_id=0xFF
nb_agc_thr=0x0000, nb_agc_nom=0x0000
Range Load Reg Size=0x58
Request Load Reg Size=0x0E
Minislot Size in number of Timebase Ticks is = 16
Minislot Size in Symbols = 64
Bandwidth Requests = 0x340D4407
Piggyback Requests = 0x1A87AD
Invalid BW Requests= 0x85DA
Minislots Requested= 0x8D613B88
Minislots Granted = 0x358EF4DF
Minislot Size in Bytes = 16
Map Advance (Dynamic) : 2003 usecs
UCD Count = 2377073
CmtsNEW#sh controllers cable 6/0 upstream 4
Cable6/0 Upstream 4 is up
Frequency 25.008 MHz, Channel Width 0.800 MHz, QPSK Symbol Rate 0.640 Msps
Spectrum Group is overridden
US phy SNR_estimate for good packets - 28.8871 dB
Nominal Input Power Level 0 dBmV, Tx Timing Offset 3683
Ranging Backoff automatic (Start 0, End 3)
Ranging Insertion Interval automatic (354 ms)
Tx Backoff Start 3, Tx Backoff End 5
Modulation Profile Group 1
Concatenation is enabled
Fragmentation is enabled
part_id=0x3137, rev_id=0x03, rev2_id=0xFF
nb_agc_thr=0x0000, nb_agc_nom=0x0000
Range Load Reg Size=0x58
Request Load Reg Size=0x0E
Minislot Size in number of Timebase Ticks is = 16
Minislot Size in Symbols = 64
Bandwidth Requests = 0xDD2138F
Piggyback Requests = 0xE36
Invalid BW Requests= 0x8C4
Minislots Requested= 0x16AC89CF
Minislots Granted = 0xE0CB2F8
Minislot Size in Bytes = 16
Map Advance (Dynamic) : 2239 usecs
UCD Count = 2377074
CmtsNEW#sh controllers cable 6/0 upstream 5
Cable6/0 Upstream 5 is up
Frequency 25.008 MHz, Channel Width 0.800 MHz, QPSK Symbol Rate 0.640 Msps
Spectrum Group is overridden
SNR - Unknown - no modems online.
Nominal Input Power Level -3 dBmV, Tx Timing Offset 0
Ranging Backoff automatic (Start 0, End 3)
Ranging Insertion Interval automatic (354 ms)
Tx Backoff Start 3, Tx Backoff End 5
Modulation Profile Group 1
Concatenation is enabled
Fragmentation is enabled
part_id=0x3137, rev_id=0x03, rev2_id=0xFF
nb_agc_thr=0x0000, nb_agc_nom=0x0000
Range Load Reg Size=0x58
Request Load Reg Size=0x0E
Minislot Size in number of Timebase Ticks is = 16
Minislot Size in Symbols = 64
Bandwidth Requests = 0xC780A2A
Piggyback Requests = 0x19B4
Invalid BW Requests= 0x1B85D1
Minislots Requested= 0xC7976900
Minislots Granted = 0xC9A3237
Minislot Size in Bytes = 16
Map Advance (Dynamic) : 1880 usecs
UCD Count = 2376982
-- My wish ... --
Avg 21 -22 SNR on QPSK upstreams may be causing this jf you have big variations in snr on per modem basis i.e. one modem has upstream snr 10 and other has 30.
Try changing upstream frequency above 30MHz. Even amplifiers with max 30MHz upstream will allow modems to work on 30MHz .
Btw: isn't 0,8MHz channel to narrow for 80 modems?! Maybe you just overloaded them? From my experience max 100-125modems per 3,2MHz QPSK channel(it still sux! latency is 50ms)
Try blocking any traffic except ipv4 and arp/rarp - it should handle unknown protocols errors.
Changing to wider channel widths may lower the SNR. The wider the channel the more noise into the receiver. A 3200 khz channel width may take the SNR down in the mid teens....
I think you should try to understand how badly the uncorrectable codewords are incrementing. The statistics can be cleared and you can monitor to see how fast they are incrementing.