11-10-2011 10:34 PM - edited 03-07-2019 03:20 AM
HI Experts ,
I am running cisco 3845 router in my site with ios :c3845-advsecurityk9-mz.124-15.T10.bin . My router gets rebooted randomly .
I am getting the below logs in the console .
*Nov 10 13:13:54.409: %TRACKING-5-STATE: 2 interface Gi0/0 line-protocol Up->Down
*Nov 10 13:13:56.373: %LINK-3-UPDOWN: Interface GigabitEthernet0/0, changed state to down
*Nov 10 13:13:56.373: %HSRP-5-STATECHANGE: GigabitEthernet0/0 Grp 5 state Active -> Init
*Nov 10 13:13:56.373: %HSRP-5-STATECHANGE: GigabitEthernet0/1 Grp 4 state Active -> Speak
*Nov 10 13:13:56.373: %RF_INTERDEV-4-RELOAD: % RF induced self-reload
Please find the interface configurations ,
interface GigabitEthernet0/0
description *** Towards ASA ***
ip address 10.10.3.114 255.255.255.248
no ip unreachables
no ip proxy-arp
ip accounting output-packets
ip flow ingress
duplex auto
speed auto
media-type rj45
standby delay reload 120
standby 5 ip 10.10.3.117
standby 5 priority 105
standby 5 preempt
standby 5 track GigabitEthernet0/1
no mop enabled
!
interface GigabitEthernet0/1
description *** Towards WAN Router ***
ip address 192.168.10.2 255.255.255.240
no ip unreachables
no ip proxy-arp
ip accounting output-packets
ip flow ingress
duplex auto
speed auto
media-type rj45
standby delay reload 120
standby 4 ip 192.168.10.1
standby 4 priority 105
standby 4 preempt
standby 4 name VPN
standby 4 track GigabitEthernet0/0
no mop enabled
crypto map OVB
!
can anyone please let me know the reason for the reload .
Regards
Angus
11-10-2011 11:37 PM
Hi Angus,
Can you check for crashinfo files in flash: and also attach following commands:
- show ver
- show log
- show stack
Nik
11-10-2011 11:58 PM
Hi Nikholay ,
Thanks for you response
Please find the attached logs asked by you . I donot have the show log output because once the router reloadsall the previous logs will be deleted .
The issue is that the router randomly hangs , while hanging we are not able to access the console or the telnet access .
While the router hangs data transfer is happening without any issues .
Regards
Angus
11-11-2011 03:10 AM
Hi Angus,
According to documentation:
http://www.cisco.com/en/US/tech/tk583/tk372/technologies_white_paper0900aecd80278edf.shtml
What your are experiencing is not a bug and it is considered as a limitation or behavior
of this feature:
" When one of the interfaces of an active router goes down, the standby router takes over
as active and handles all the operations. However, the previous active
router undergoes a reload and eventually stabilizes as the standby router (if the priority
of the router is at or below that of the current active router)."
That is why after the Gi0/0 went down the active router reloaded:
*Nov 10 13:13:54.409: %TRACKING-5-STATE: 2 interface Gi0/0 line-protocol Up->Down
%RF_INTERDEV-4-RELOAD: % RF induced self-reload
I guess that port was your IPC link. The IPC link is where the hello packets of both routers are passed.
If you shutdown the interface of the router or the port of the switch where the interface
is connected, the active router would not receive hello packets and
standby router would take the state of being active causing the active router to reload."
Also, this is "normal" when the Routers are connected back to back:
" Routers must be connected using a hub or a switch. If routers are
connected back to back, any time the active router reloads, the standby router also
reloads. This arrangement defeats the purpose of IPsec HA."
This is also documented as DDTS:
IPsec HA router reloads when HSRP i/f goes down
The HA router reloads due to a 'RF induced reload' whenever the
crypto+hsrp interface is shut down. This is documented as expected behavior.
If you shutdown the interface of the router or the port of the switch
where the interface is connected, the active router would not receive hello packets and
standby router would take the state of being active causing the active router to reload.
So what you see is expected upon the IPC link going down. If you want to avoid it try to have your hello passing through L2 hub or switch.
Hope this helps,
Nik
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