I have A Cisco 2950 connected to three servers that control video. They are connected to Fa0/19, 20 and 21. These ports have accumulated a lot of received-discards, however when I look at the buffers I don't see failurs past the initial small buffer pool. Also I've been monitoring the bandwidth to the switch and I never see more then a Meg. of traffic, and it only last 30ms. at a time. I have the error counters and buffers posted below. The errors inciment around 150 a day.
I'm confused on what could be causing the errors when it doesn't appear the buffers are overloaded.
Also on the same switch port fa0/14 is halfduplex, and has a lot of "invalid frame too small" errors. However they are not accompanied by FCS erros.
My question on this port is even though FCS errors are not incimenting does this still mean I may have a physical issue? I have posted the stats for this port below as well.
Thank you in advance for all your help.
The following is for ports Fa0/19, 20 and 21:
fa0/19
Transmit Receive
2095285155 Bytes 3474182095 Bytes
1142801073 Frames 484606610 Frames
47346993 Multicast frames 8 FCS errors
662954582 Broadcast frames 31 Multicast frames
0 Pause frames 76583 Broadcast frames
0 Single defer frames 0 Control frames
0 Multiple defer frames 0 Pause frames
0 1 collision frames 0 Unknown opcode frames
0 2-15 collisions 0 Alignment errors
0 Late collisions 0 Length out of range
0 Excessive collisions 0 Symbol error frames
0 Total collisions 4 False carrier errors
0 Control frames 0 Valid frames, too small
0 VLAN discard frames 0 Valid frames, too large
0 Too old frames 0 Invalid frames, too small
0 Tagged frames 0 Invalid frames, too large
0 Aborted Tx frames 159520 Discarded frames
Transmit and Receive
337702642 Minimum size frames
641223518 65 to 127 byte frames
71044103 128 to 255 byte frames
22332800 256 to 511 byte frames
10391259 512 to 1023 byte frames
544714007 1024 to 1518 byte frames
0 1519 to 1522 byte frames
TNETCSW3#sho controller ethernet-controller fa0/20
Transmit Receive
107028090 Bytes 1918862450 Bytes
1074026710 Frames 336344146 Frames
47345339 Multicast frames 0 FCS errors
662923293 Broadcast frames 5 Multicast frames
0 Pause frames 83322 Broadcast frames
0 Single defer frames 0 Control frames
0 Multiple defer frames 0 Pause frames
0 1 collision frames 0 Unknown opcode frames
0 2-15 collisions 0 Alignment errors
0 Late collisions 0 Length out of range
0 Excessive collisions 0 Symbol error frames
0 Total collisions 1 False carrier errors
0 Control frames 0 Valid frames, too small
0 VLAN discard frames 0 Valid frames, too large
0 Too old frames 0 Invalid frames, too small
0 Tagged frames 0 Invalid frames, too large
0 Aborted Tx frames 743832 Discarded frames
Transmit and Receive
255469575 Minimum size frames
642532815 65 to 127 byte frames
81055831 128 to 255 byte frames
22153755 256 to 511 byte frames
23591322 512 to 1023 byte frames
385567566 1024 to 1518 byte frames
0 1519 to 1522 byte frames
TNETCSW3#sho controller ethernet-controller fa0/21
Transmit Receive
3928930119 Bytes 1117890492 Bytes
970097528 Frames 133541681 Frames
47347724 Multicast frames 0 FCS errors
662818222 Broadcast frames 12 Multicast frames
0 Pause frames 228293 Broadcast frames
0 Single defer frames 0 Control frames
0 Multiple defer frames 0 Pause frames
0 1 collision frames 0 Unknown opcode frames
0 2-15 collisions 0 Alignment errors
0 Late collisions 0 Length out of range
0 Excessive collisions 0 Symbol error frames
0 Total collisions 1 False carrier errors
0 Control frames 0 Valid frames, too small
0 VLAN discard frames 0 Valid frames, too large
0 Too old frames 0 Invalid frames, too small
0 Tagged frames 0 Invalid frames, too large
0 Aborted Tx frames 647646 Discarded frames
Transmit and Receive
164654700 Minimum size frames
643772953 65 to 127 byte frames
65280446 128 to 255 byte frames
21796024 256 to 511 byte frames
9691514 512 to 1023 byte frames
198443572 1024 to 1518 byte frames
0 1519 to 1522 byte frames
Below are the buffers:
TNETCSW3#sho buffers
Buffer elements:
499 in free list (500 max allowed)
1360154859 hits, 0 misses, 0 created
Public buffer pools:
Small buffers, 104 bytes (total 25, permanent 25, peak 58 @ 7w0d):
25 in free list (20 min, 60 max allowed)
720855802 hits, 121 misses, 159 trims, 159 created
7 failures (0 no memory)
Middle buffers, 600 bytes (total 21, permanent 15, peak 42 @ 7w0d):
19 in free list (10 min, 30 max allowed)
13179815 hits, 34 misses, 79 trims, 85 created
0 failures (0 no memory)
Big buffers, 1524 bytes (total 6, permanent 5, peak 11 @ 7w0d):
6 in free list (5 min, 10 max allowed)
15480999 hits, 20 misses, 5898 trims, 5899 created
0 failures (0 no memory)
VeryBig buffers, 4520 bytes (total 4, permanent 0, peak 4 @ 7w0d):
4 in free list (0 min, 10 max allowed)
5526668 hits, 2 misses, 0 trims, 4 created
0 failures (0 no memory)
Large buffers, 5024 bytes (total 0, permanent 0):
0 in free list (0 min, 5 max allowed)
0 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)
Huge buffers, 18024 bytes (total 0, permanent 0):
0 in free list (0 min, 2 max allowed)
0 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)
Interface buffer pools:
Calhoun Packet Receive Pool buffers, 1560 bytes (total 256, permanent 256):
223 in free list (0 min, 256 max allowed)
744881169 hits, 0 misses
The following is for fa0/14
TNETCSW3#sho controller ethernet-controller fa0/14
Transmit Receive
1157866402 Bytes 3254025616 Bytes
1119776733 Frames 229517205 Frames
47343734 Multicast frames 0 FCS errors
662987968 Broadcast frames 0 Multicast frames
0 Pause frames 0 Broadcast frames
1761139 Single defer frames 0 Control frames
0 Multiple defer frames 0 Pause frames
1348428 1 collision frames 0 Unknown opcode frames
313303 2-15 collisions 0 Alignment errors
0 Late collisions 0 Length out of range
0 Excessive collisions 0 Symbol error frames
1994020 Total collisions 0 False carrier errors
0 Control frames 0 Valid frames, too small
0 VLAN discard frames 0 Valid frames, too large
0 Too old frames 15461 Invalid frames, too small
0 Tagged frames 0 Invalid frames, too large
0 Aborted Tx frames 0 Discarded frames
I'm confused on what could be causing the errors when it doesn't appear the buffers are overloaded.
Also on the same switch port fa0/14 is halfduplex, and has a lot of "invalid frame too small" errors. However they are not accompanied by FCS erros.
My question on this port is even though FCS errors are not incimenting does this still mean I may have a physical issue? I have posted the stats for this port below as well.
Thank you in advance for all your help.
The following is for ports Fa0/19, 20 and 21:
fa0/19
Transmit Receive
2095285155 Bytes 3474182095 Bytes
1142801073 Frames 484606610 Frames
47346993 Multicast frames 8 FCS errors
662954582 Broadcast frames 31 Multicast frames
0 Pause frames 76583 Broadcast frames
0 Single defer frames 0 Control frames
0 Multiple defer frames 0 Pause frames
0 1 collision frames 0 Unknown opcode frames
0 2-15 collisions 0 Alignment errors
0 Late collisions 0 Length out of range
0 Excessive collisions 0 Symbol error frames
0 Total collisions 4 False carrier errors
0 Control frames 0 Valid frames, too small
0 VLAN discard frames 0 Valid frames, too large
0 Too old frames 0 Invalid frames, too small
0 Tagged frames 0 Invalid frames, too large
0 Aborted Tx frames 159520 Discarded frames
Transmit and Receive
337702642 Minimum size frames
641223518 65 to 127 byte frames
71044103 128 to 255 byte frames
22332800 256 to 511 byte frames
10391259 512 to 1023 byte frames
544714007 1024 to 1518 byte frames
0 1519 to 1522 byte frames
TNETCSW3#sho controller ethernet-controller fa0/20
Transmit Receive
107028090 Bytes 1918862450 Bytes
1074026710 Frames 336344146 Frames
47345339 Multicast frames 0 FCS errors
662923293 Broadcast frames 5 Multicast frames
0 Pause frames 83322 Broadcast frames
0 Single defer frames 0 Control frames
0 Multiple defer frames 0 Pause frames
0 1 collision frames 0 Unknown opcode frames
0 2-15 collisions 0 Alignment errors
0 Late collisions 0 Length out of range
0 Excessive collisions 0 Symbol error frames
0 Total collisions 1 False carrier errors
0 Control frames 0 Valid frames, too small
0 VLAN discard frames 0 Valid frames, too large
0 Too old frames 0 Invalid frames, too small
0 Tagged frames 0 Invalid frames, too large
0 Aborted Tx frames 743832 Discarded frames
Transmit and Receive
255469575 Minimum size frames
642532815 65 to 127 byte frames
81055831 128 to 255 byte frames
22153755 256 to 511 byte frames
23591322 512 to 1023 byte frames
385567566 1024 to 1518 byte frames
0 1519 to 1522 byte frames
TNETCSW3#sho controller ethernet-controller fa0/21
Transmit Receive
3928930119 Bytes 1117890492 Bytes
970097528 Frames 133541681 Frames
47347724 Multicast frames 0 FCS errors
662818222 Broadcast frames 12 Multicast frames
0 Pause frames 228293 Broadcast frames
0 Single defer frames 0 Control frames
0 Multiple defer frames 0 Pause frames
0 1 collision frames 0 Unknown opcode frames
0 2-15 collisions 0 Alignment errors
0 Late collisions 0 Length out of range
0 Excessive collisions 0 Symbol error frames
0 Total collisions 1 False carrier errors
0 Control frames 0 Valid frames, too small
0 VLAN discard frames 0 Valid frames, too large
0 Too old frames 0 Invalid frames, too small
0 Tagged frames 0 Invalid frames, too large
0 Aborted Tx frames 647646 Discarded frames
Transmit and Receive
164654700 Minimum size frames
643772953 65 to 127 byte frames
65280446 128 to 255 byte frames
21796024 256 to 511 byte frames
9691514 512 to 1023 byte frames
198443572 1024 to 1518 byte frames
0 1519 to 1522 byte frames
Below are the buffers:
TNETCSW3#sho buffers
Buffer elements:
499 in free list (500 max allowed)
1360154859 hits, 0 misses, 0 created
Public buffer pools:
Small buffers, 104 bytes (total 25, permanent 25, peak 58 @ 7w0d):
25 in free list (20 min, 60 max allowed)
720855802 hits, 121 misses, 159 trims, 159 created
7 failures (0 no memory)
Middle buffers, 600 bytes (total 21, permanent 15, peak 42 @ 7w0d):
19 in free list (10 min, 30 max allowed)
13179815 hits, 34 misses, 79 trims, 85 created
0 failures (0 no memory)
Big buffers, 1524 bytes (total 6, permanent 5, peak 11 @ 7w0d):
6 in free list (5 min, 10 max allowed)
15480999 hits, 20 misses, 5898 trims, 5899 created
0 failures (0 no memory)
VeryBig buffers, 4520 bytes (total 4, permanent 0, peak 4 @ 7w0d):
4 in free list (0 min, 10 max allowed)
5526668 hits, 2 misses, 0 trims, 4 created
0 failures (0 no memory)
Large buffers, 5024 bytes (total 0, permanent 0):
0 in free list (0 min, 5 max allowed)
0 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)
Huge buffers, 18024 bytes (total 0, permanent 0):
0 in free list (0 min, 2 max allowed)
0 hits, 0 misses, 0 trims, 0 created
0 failures (0 no memory)
Interface buffer pools:
Calhoun Packet Receive Pool buffers, 1560 bytes (total 256, permanent 256):
223 in free list (0 min, 256 max allowed)
744881169 hits, 0 misses
The following is for fa0/14
TNETCSW3#sho controller ethernet-controller fa0/14
Transmit Receive
1157866402 Bytes 3254025616 Bytes
1119776733 Frames 229517205 Frames
47343734 Multicast frames 0 FCS errors
662987968 Broadcast frames 0 Multicast frames
0 Pause frames 0 Broadcast frames
1761139 Single defer frames 0 Control frames
0 Multiple defer frames 0 Pause frames
1348428 1 collision frames 0 Unknown opcode frames
313303 2-15 collisions 0 Alignment errors
0 Late collisions 0 Length out of range
0 Excessive collisions 0 Symbol error frames
1994020 Total collisions 0 False carrier errors
0 Control frames 0 Valid frames, too small
0 VLAN discard frames 0 Valid frames, too large
0 Too old frames 15461 Invalid frames, too small
0 Tagged frames 0 Invalid frames, too large
0 Aborted Tx frames 0 Discarded frames