Hello, I just had a look at the logs on a pair of 6509's with SUP-720-3B. They have a etherchannel between them (just standard basic campus config - with OSPF) and I get these so so frequently, fairly new to multicast arena so I have no idea why this is happening, could someone perhaps explain what is happening. Why would this just drop for 0.0.0.0 (itself, right?):
6509-1
May 2 21:23:46.697 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 UP on interface Vlan24
May 2 21:23:46.701 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 DOWN on interface Vlan24 non DR
May 2 21:24:16.697 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 UP on interface Vlan24
May 2 21:24:16.701 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 DOWN on interface Vlan24 non DR
May 2 21:24:46.697 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 UP on interface Vlan24
May 2 21:24:46.701 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 DOWN on interface Vlan24 non DR
May 2 21:25:16.701 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 UP on interface Vlan24
May 2 21:25:16.705 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 DOWN on interface Vlan24 non DR
May 2 21:25:46.697 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 UP on interface Vlan24
May 2 21:25:46.701 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 DOWN on interface Vlan24 non DR
May 2 21:26:16.697 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 UP on interface Vlan24
May 2 21:26:16.701 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 DOWN on interface Vlan24 non DR
May 2 21:26:46.697 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 UP on interface Vlan24
May 2 21:26:46.701 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 DOWN on interface Vlan24 non DR
May 2 21:27:16.697 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 UP on interface Vlan24
May 2 21:27:16.701 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 DOWN on interface Vlan24 non DR
May 2 21:27:46.697 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 UP on interface Vlan24
May 2 21:27:46.701 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 DOWN on interface Vlan24 non DR
6509-2
May 2 21:34:16.700 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 UP on interface Vlan24
May 2 21:34:16.704 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 DOWN on interface Vlan24 non DR
May 2 21:34:46.701 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 UP on interface Vlan24
May 2 21:34:46.705 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 DOWN on interface Vlan24 non DR
May 2 21:35:16.713 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 UP on interface Vlan24
May 2 21:35:16.717 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 DOWN on interface Vlan24 non DR
May 2 21:35:46.709 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 UP on interface Vlan24
May 2 21:35:46.713 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 DOWN on interface Vlan24 non DR
May 2 21:36:16.709 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 UP on interface Vlan24
May 2 21:36:16.713 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 DOWN on interface Vlan24 non DR
May 2 21:36:46.709 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 UP on interface Vlan24
May 2 21:36:46.713 BST: %PIM-5-NBRCHG: neighbor 0.0.0.0 DOWN on interface Vlan24 non DR
It seems exactly every 30 seconds this happens. This is the config for vlan 24
6509-1#show run int vlan 24
Building configuration...
Current configuration : 312 bytes
!
interface Vlan24
description *** Server VLAN***
ip address 172.25.24.2 255.255.252.0
ip helper-address 172.25.24.137
ip helper-address 172.25.24.138
ip directed-broadcast 110
ip flow ingress
ip flow egress
ip pim sparse-mode
standby 24 ip 172.25.24.1
standby 24 priority 110
standby 24 preempt
end
6509-2#show run int vlan 24
Building configuration...
Current configuration : 311 bytes
!
interface Vlan24
description *** Server VLAN***
ip address 172.25.24.3 255.255.252.0
ip helper-address 172.25.24.137
ip helper-address 172.25.24.138
ip directed-broadcast 110
ip flow ingress
ip flow egress
ip pim sparse-mode
standby 24 ip 172.25.24.1
standby 24 priority 90
standby 24 preempt
end
6509-1#show ip pim neighbor
PIM Neighbor Table
Mode: B - Bidir Capable, DR - Designated Router, N - Default DR Priority,
P - Proxy Capable, S - State Refresh Capable, G - GenID Capable
Neighbor Interface Uptime/Expires Ver DR
Address Prio/Mode
172.25.18.3 Vlan18 29w4d/00:01:36 v2 1 / DR S P G
172.25.24.3 Vlan24 29w4d/00:01:32 v2 1 / DR S P G
172.25.28.3 Vlan28 29w4d/00:01:26 v2 1 / DR S P G
172.25.32.3 Vlan32 29w4d/00:01:40 v2 1 / DR S P G
172.25.36.3 Vlan36 29w4d/00:01:23 v2 1 / DR S P G
172.25.40.3 Vlan40 29w4d/00:01:43 v2 1 / DR S P G
172.25.44.3 Vlan44 29w4d/00:01:38 v2 1 / DR S P G
172.25.48.3 Vlan48 29w4d/00:01:41 v2 1 / DR S P G
172.25.52.3 Vlan52 29w4d/00:01:27 v2 1 / DR S P G
172.25.56.3 Vlan56 29w4d/00:01:22 v2 1 / DR S P G
172.25.60.3 Vlan60 29w4d/00:01:30 v2 1 / DR S P G
172.25.64.3 Vlan64 29w4d/00:01:21 v2 1 / DR S P G
172.25.68.3 Vlan68 29w4d/00:01:28 v2 1 / DR S P G
172.25.72.3 Vlan72 29w4d/00:01:28 v2 1 / DR S P G
172.25.76.3 Vlan76 29w4d/00:01:16 v2 1 / DR S P G
172.25.84.3 Vlan84 29w4d/00:01:30 v2 1 / DR S P G
192.168.250.3 Vlan590 10w1d/00:01:33 v2 1 / S P G
192.168.250.6 Vlan590 10w1d/00:01:35 v2 1 / DR S P G
192.168.250.5 Vlan590 10w1d/00:01:21 v2 1 / S P G
192.168.240.6 Vlan592 10w1d/00:01:21 v2 1 / DR S P G
192.168.240.5 Vlan592 15w5d/00:01:34 v2 1 / S P G
192.168.240.3 Vlan592 10w1d/00:01:16 v2 1 / S P G
Thank you
B
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Please rate useful posts & remember to mark any solved questions as answered. Thank you.
