Hi All,
We are using two 6500 User distribution connected with port channel also WLC is connected on Dist-2 now, these two 6500 are connected with backend core 7609 running ospf in between. Spanning-tree root and Standby Active on Dist-1
Suddenly we are facing High CPU utilization on switches, couldn't able to ping nor login. However I could observe to the following through console.
Switch1 is stable, all the vlans are active, but on standby all the vlans are getting state changes, suspecting there are not getting hello's on time due to which it is going to active and standby.
%HSRP-5-STATECHANGE: Vlan208 Grp 208 state Standby -> Active
%HSRP-5-STATECHANGE: Vlan160 Grp 160 state Speak -> Standby
%HSRP-5-STATECHANGE: Vlan115 Grp 115 state Standby -> Active
%HSRP-5-STATECHANGE: Vlan156 Grp 156 state Speak -> Standby
%HSRP-5-STATECHANGE: Vlan208 Grp 208 state Speak -> Standby
%HSRP-5-STATECHANGE: Vlan209 Grp 209 state Speak -> Standby
%HSRP-5-STATECHANGE: Vlan196 Grp 196 state Speak -> Standby
%HSRP-5-STATECHANGE: Vlan112 Grp 112 state Speak -> Standby
%HSRP-5-STATECHANGE: Vlan196 Grp 196 state Standby -> Active
Configuration of Wireless VLAN
on both switch
interface Vlan198
ip address 10.X.X.X
ip helper-address
standby 198 ip 10.X.X.X
standby 198 timers 250 msec 750
standby 198 priority 90
standby 198 preempt
end
All the vlans having same timers and preempt on both switches,
we are not tracking any interface, can I remove preempt on secondary switch?
I have captured packets through netdr
Dist-2
interface Vl198, routine mistral_process_rx_packet_inlin, timestamp 23:53:02.823
dbus info: src_vlan 0xC6(198), src_indx 0x2(2), len 0x40(64)
bpdu 0, index_dir 0, flood 1, dont_lrn 0, dest_indx 0x40C6(16582)
F8020400 00C60000 00020000 40080168
S000 E0000560 8E0FFFF8 00000008 40C60000
mistral hdr: req_token 0x0(0), src_index 0x2(2), rx_offset 0x76(118)
requeue 0, obl_pkt 0, vlan 0xC6(198)
destmac FF.FF.FF.FF.FF.FF, srcmac 00.00.0C.07.AC.C6, protocol 0806
layer 3 data: 00010800 06040002 00000C07 ACC60A19 C601FFFF FFFFFFFF
0A19C601 00000000 00000000 00000000 00000000 0000C601
8300A369 00000000 0000FFFF
protocol ip: version 0x04, hlen 0x05, tos 0x00, totlen 48, identifier 0
df 0, mf 0, fo 0, ttl 1, src 10.X.X.X, dst 224.0.0.2
udp src 1985, dst 1985 len 28 checksum 0x53BE
Dist -1
interface Vl198, routine mistral_process_rx_packet_inlin, timestamp 23:48:26.830
dbus info: src_vlan 0xC6(198), src_indx 0x341(833), len 0x42(66)
bpdu 0, index_dir 0, flood 1, dont_lrn 0, dest_indx 0x40C6(16582)
60020401 00C60400 03410400 42080000 00110448 0E087C7C 00000008 40C60000
mistral hdr: req_token 0x0(0), src_index 0x341(833), rx_offset 0x76(118)
requeue 0, obl_pkt 0, vlan 0xC6(198)
destmac 01.00.5E.00.00.02, srcmac 00.00.0C.07.AC.C6, protocol 0800
protocol ip: version 0x04, hlen 0x05, tos 0x00, totlen 48, identifier 0
df 0, mf 0, fo 0, ttl 1, src 10.X.X.X, dst 224.0.0.2
udp src 1985, dst 1985 len 28 checksum 0x53BF
This issue is not continuous, its triggering intermittently sometime with in couple of hours or days
