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Cisco Bug: CSCuj02925 - 40% ping fail to collector from SVI interface after NF mon sess changes

Last Modified

May 14, 2015

Products (1)

  • Cisco Unified Computing System

Known Affected Releases

2.2(0.253)A 2.2(1.174)A

Description (partial)

Symptom:
1) vNIC was associated with monitor Session 2nd-netflow to monSessionS2 and back to 2nd-netflow

2) verified ip forwarding from FI to netflow collector.

  FI is exporting netflow records to collector using VLAN 999.





interface Vethernet876
  layer2-switched flow monitor 2nd-netflow input
  l2 flow monitor 2nd-netflow output

cc18-f2-A(nx-os)# show run interface Veth876

!Command: show running-config interface Vethernet876
!Time: Tue Sep  3 17:30:43 2013

version 5.2(3)N2(2.21)

interface Vethernet876
  description server 1/3, VNIC eth0
  switchport mode trunk
  no pinning server sticky
  pinning server pinning-failure link-down
  no cdp enable
  switchport trunk native vlan 100
  switchport trunk allowed vlan 1,100,268,999,2001
  bind interface port-channel1280 channel 876
  service-policy type queuing input default-in-policy
  no shutdown
  layer2-switched flow monitor 2nd-netflow input
  l2 flow monitor 2nd-netflow output

cc18-f2-A(nx-os)# sho vers

Software
  BIOS:      version 3.6.0
  loader:    version N/A
  kickstart: version 5.2(3)N2(2.21) [build 5.2(3)N2(2.20.253)] [gdb]
  system:    version 5.2(3)N2(2.21) [build 5.2(3)N2(2.20.253)] [gdb]
  power-seq: Module 1: version v5.0
             Module 3: version v1.0
  uC:        version v1.0.0.2
  SFP uC:    Module 1: v1.1.0.0
  BIOS compile time:       05/09/2012
  kickstart image file is: bootflash:///installables/switch/ucs-6100-k9-kickstar
t.5.2.3.N2.2.20.253.gbin
cc18-f2-A(nx-os)#

Conditions:
--- 10.255.99.99 ping statistics ---
5 packets transmitted, 3 packets received, 40.00% packet loss
round-trip min/avg/max = 0.747/0.776/0.82 ms
cc18-f2-A(nx-os)#
cc18-f2-A(nx-os)# sho ip arp

Flags: * - Adjacencies learnt on non-active FHRP router
       + - Adjacencies synced via CFSoE
       # - Adjacencies Throttled for Glean
       D - Static Adjacencies attached to down interface

IP ARP Table for context default
Total number of entries: 2
Address         Age       MAC Address     Interface
10.255.99.98    00:13:57  000c.29d3.d028  Vlan999
10.255.99.99    00:13:54  000c.2952.7e60  Vlan999

cc18-f2-A(nx-os)# ping 10.255.99.99
PING 10.255.99.99 (10.255.99.99): 56 data bytes
64 bytes from 10.255.99.99: icmp_seq=0 ttl=127 time=0.86 ms
Request 1 timed out
64 bytes from 10.255.99.99: icmp_seq=2 ttl=127 time=0.826 ms
Request 3 timed out
64 bytes from 10.255.99.99: icmp_seq=4 ttl=127 time=0.841 ms

--- 10.255.99.99 ping statistics ---
5 packets transmitted, 3 packets received, 40.00% packet loss  <=====
round-trip min/avg/max = 0.826/0.842/0.86 ms

cc18-f2-A(nx-os)# ping 10.255.99.99 source 10.255.99.100
PING 10.255.99.99 (10.255.99.99) from 10.255.99.100: 56 data bytes
64 bytes from 10.255.99.99: icmp_seq=0 ttl=127 time=0.834 ms
Request 1 timed out
64 bytes from 10.255.99.99: icmp_seq=2 ttl=127 time=1.631 ms
Request 3 timed out
64 bytes from 10.255.99.99: icmp_seq=4 ttl=127 time=0.695 ms

--- 10.255.99.99 ping statistics ---
5 packets transmitted, 3 packets received, 40.00% packet loss
round-trip min/avg/max = 0.695/1.053/1.631 ms


cc18-f2-A(nx-os)# ping 10.255.99.99 timeout 10
PING 10.255.99.99 (10.255.99.99): 56 data bytes
64 bytes from 10.255.99.99: icmp_seq=0 ttl=127 time=0.794 ms
Request 1 timed out
64 bytes from 10.255.99.99: icmp_seq=2 ttl=127 time=0.766 ms
Request 3 timed out
64 bytes from 10.255.99.99: icmp_seq=4 ttl=127 time=0.854 ms

--- 10.255.99.99 ping statistics ---
5 packets transmitted, 3 packets received, 40.00% packet loss
round-trip min/avg/max = 0.766/0.804/0.854 ms
cc18-f2-A(nx-os)# ping 10.255.99.100
PING 10.255.99.100 (10.255.99.100): 56 data bytes
64 bytes from 10.255.99.100: icmp_seq=0 ttl=255 time=0.494 ms
64 bytes from 10.255.99.100: icmp_seq=1 ttl=255 time=0.361 ms
64 bytes from 10.255.99.100: icmp_seq=2 ttl=255 time=0.352 ms
64 bytes from 10.255.99.100: icmp_seq=3 ttl=255 time=0.351 ms
64 bytes from 10.255.99.100: icmp_seq=4 ttl=255 time=0.352 ms

--- 10.255.99.100 ping statistics ---
5 packets transmitted, 5 packets received, 0.00% packet loss
round-trip min/avg/max = 0.351/0.382/0.494 ms
cc18-f2-A(nx-os)#
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