Hi guys,
We have some problems with delayed packets at our Catalyst 4500. Sometimes Profinet packets took 6ms to leave the switch. The packets are arriving every 2ms at the switch from Core and sometimes the switch is buffering 3 packets and sends them out 6ms after the first packet arrived to the access switch (catalyst 2960). There is no policy-map added to the interfaces. The issue appears at both VSL-members.
I checked it with a wireshark trace on the cable and the packets are defintly delayed on the switch. Profinet Packets are marked with CoS 6 tag.
Any ideas?
Interface connected to Core:
#show running-config interface port-channel 4
Building configuration...
Current configuration : 115 bytes
!
interface Port-channel4
description Uplink Core
switchport
switchport mode trunk
ip dhcp snooping trust
end
Interface to Access Switch Catalyst 2960
#show running-config interface port-channel 23
Building configuration...
Current configuration : 308 bytes
!
interface Port-channel23
description 10.11.239.217
switchport
switchport trunk allowed vlan 197,305,306,320,344,356,399,1308,1310,1341,1375
switchport trunk allowed vlan add 1376,1379-1381,1394,1397,1399,1573,2320,2322
switchport trunk allowed vlan add 2327,2350,2374,2389
switchport mode trunk
end
Po23 Member statistics
#show interfaces tenGigabitEthernet 1/1/8 counters detail
Port InBytes InUcastPkts InMcastPkts InBcastPkts
Te1/1/8 5043690371767 23026620517 3166161 5158689
Port OutBytes OutUcastPkts OutMcastPkts OutBcastPkts
Te1/1/8 1586406698413 12721956997 56482200 100615783
Port InPkts 64 OutPkts 64 InPkts 65-127 OutPkts 65-127
Te1/1/8 1 300799856 20435710512 12225356192
Port InPkts 128-255 OutPkts 128-255 InPkts 256-511 OutPkts 256-511
Te1/1/8 114451064 132562169 83807406 23250875
Port InPkts 512-1023 OutPkts 512-1023
Te1/1/8 33649565 10383067
Port InPkts 1024-1518 OutPkts 1024-1518 InPkts 1519-9216 OutPkts 1519-9216
Te1/1/8 185480506 78559163 2181846313 108143659
Port Tx-Bytes-Queue-1 Tx-Bytes-Queue-2 Tx-Bytes-Queue-3 Tx-Bytes-Queue-4
Te1/1/8 418496821 0 0 0
Port Tx-Bytes-Queue-5 Tx-Bytes-Queue-6 Tx-Bytes-Queue-7 Tx-Bytes-Queue-8
Te1/1/8 0 0 0 1585988150511
Port Tx-Drops-Queue-1 Tx-Drops-Queue-2 Tx-Drops-Queue-3 Tx-Drops-Queue-4
Te1/1/8 0 0 0 0
Port Tx-Drops-Queue-5 Tx-Drops-Queue-6 Tx-Drops-Queue-7 Tx-Drops-Queue-8
Te1/1/8 0 0 0 796
Port Dbl-Drops-Queue-1 Dbl-Drops-Queue-2 Dbl-Drops-Queue-3 Dbl-Drops-Queue-4
Te1/1/8 0 0 0 0
Port Dbl-Drops-Queue-5 Dbl-Drops-Queue-6 Dbl-Drops-Queue-7 Dbl-Drops-Queue-8
Te1/1/8 0 0 0 0
Port Rx-No-Pkt-Buff RxPauseFrames TxPauseFrames PauseFramesDrop
Te1/1/8 0 0 0 0
Port UnsupOpcodePause
Te1/1/8 0
#show version
Cisco IOS Software, IOS-XE Software, Catalyst 4500 L3 Switch Software (cat4500e-UNIVERSALK9-M), Version 03.06.07.E RELEASE SOFTWARE (fc3)
