Hello,
I'm totally stucked with the following problem ->
Catalyst 7606 ( IOS 12.2(33)SRD4) with WS-F6700-DFC3CXL module connected
with C3750-E (IOS 12.2(40)SE) over TenGigabit Xenpaks. Its one of our
backbone lines, transferring only VLAN-201.
There are two small subnets in this VLAN assigned to two servers, which are
connected to 3750. Vlan-201 is routed on 7606
When traffic on this link reaches aproximately 6Gbps, latence to servers
gets rapidly worse (about 100-150ms, about 2ms before) and speed is
unpredictably slowing. Servers are able to generate much more than 10Gbps. I
have tried to assign IP from this VLAN directly to vlan-interface at 3750
and latence is bad as well.
The two problems which I can see at 7606 are following:
1) Input queue drops at the interface. They appear at the same time as the
high latence. I tried to set lower hold-queue, but no difference. Any type
of qos or other bandwidht limiting methods are applied.
sitel-edge-new#show int te4/8
TenGigabitEthernet4/8 is up, line protocol is up (connected)
Hardware is C7600 10Gb 802.3, address is 001e.f7f7.bd5f (bia
001e.f7f7.bd5f)
Description: SITEL-TTC-New10GbE
MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec,
reliability 255/255, txload 3/255, rxload 126/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 10Gb/s
Transport mode LAN (10GBASE-R, 10.3125Gb/s)
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:07, output 00:00:41, output hang never
Last clearing of "show interface" counters 18:56:25
Input queue: 0/4096/96151289/0 (size/max/drops/flushes); Total output
drops: 0
Queueing strategy: fifo
Output queue: 0/4096 (size/max)
30 second input rate 4942942000 bits/sec, 410813 packets/sec
30 second output rate 143433000 bits/sec, 241176 packets/sec
34434311308 packets input, 51018973201607 bytes, 0 no buffer
Received 21472 broadcasts (17607 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 96151289 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
19623750753 packets output, 3094225873410 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out
the second side of line looks ok
TTC-3750-MAIN#show int te2/0/2
TenGigabitEthernet2/0/2 is up, line protocol is up (connected)
Hardware is Ten Gigabit Ethernet, address is 001e.7a4f.fb9e (bia
001e.7a4f.fb9e)
Description: TTC-SITEL-New10GbE
MTU 1600 bytes, BW 10000000 Kbit, DLY 10 usec,
reliability 255/255, txload 129/255, rxload 3/255
Encapsulation ARPA, loopback not set
Keepalive not set
Full-duplex, 10Gb/s, link type is auto, media type is 10GBase-SR
Media-type configured as connector
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:51, output 00:00:16, output hang never
Last clearing of "show interface" counters 01:36:19
Input queue: 0/4096/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/4096 (size/max)
30 second input rate 149330000 bits/sec, 249506 packets/sec
30 second output rate 5062720000 bits/sec, 420886 packets/sec
1400794396 packets input, 104446053346 bytes, 0 no buffer
Received 0 broadcasts (1250 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 1250 multicast, 0 pause input
0 input packets with dribble condition detected
2427526833 packets output, 3649915537744 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
2) It looks that concerned transciever is a little bit overheated..but I
don't trust these sensors much..
sitel-edge-new#show interfaces transceiver
Transceiver monitoring is disabled for all interfaces.
Optical Optical
Temperature Voltage Current Tx Power Rx Power
Port (Celsius) (Volts) (mA) (dBm) (dBm)
--------- ----------- ------- -------- -------- --------
Te4/1 39.3 0.00 36.8 -2.8 -1.0
Te4/2 34.6 0.00 43.1 -2.6 -3.3
Te4/3 36.8 0.00 29.7 -2.5 -1.0
Te4/4 35.3 0.00 5.9 -1.9 -1.7
Te4/5 44.1 0.00 45.4 -2.0 -7.7
Te4/6 40.0 0.00 36.0 -3.4 -2.2
Te4/7 40.8 0.00 34.0 -3.3 -0.5 +
Te4/8 71.9 + 0.00 6.0 -3.2 -3.4
some more debug info:
7606 ->
sitel-edge-new#show platform hardware capacity fabric
Switch Fabric Resources
Bus utilization: current: 35%, peak was 47% at 19:53:03 CET Thu Mar 11
2010
Fabric utilization: Ingress Egress
Module Chanl Speed rate peak rate peak
1 0 20G 14% 21% @18:26 11Mar10 19% 31% @18:20
12Mar10
2 0 20G 25% 39% @17:50 11Mar10 2% 10% @02:07
12Mar10
2 1 20G 10% 26% @19:41 11Mar10 33% 49% @18:06
11Mar10
4 0 20G 25% 63% @13:00 14Mar10 5% 20% @18:15
11Mar10
4 1 20G 45% 79% @18:07 11Mar10 50% 73% @09:43
13Mar10
5 0 20G 2% 5% @14:22 12Mar10 12% 19% @19:08
11Mar10
Switching mode: Module Switching
mode
1
truncated
2
truncated
4
compact
5 flow
through
I'm going to replace the "overheated" transciever in 7606 this night and
hope it's the solution..but don't trust it much.
Any advice would be really appreciated!
Best regards,
Jiri Prochazka
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