From: Jian Gu (guxiaojian@gmail.com)
Date: Wed Nov 22 2006 - 15:13:36 ART
Without any show and debug output, it is hard for anybody to figure out what
went wrong.
It could be that the interface in question failed to send out gratitous ARPs
before ARP caches expires, a simple work around is to manually configure ARP
timeout on the interface to force the interface to send gratituous ARPs, the
following example shows how to force an interface to send out gratituous
ARPs every minute. Hope this will save you from clearing ARP cache every 30
minutes.
Jian
Current configuration : 91 bytes
!
interface Ethernet0/0
ip address 13.13.13.3 255.255.255.0
mpls ip
arp timeout 60
end
R3#
Nov 22 18:10:17.598: IP ARP: sent req src 13.13.13.3 aabb.cc00.6700,
dst 13.13.13.100 aabb.cc00.6510 Ethernet0/0
Nov 22 18:10:17.598: IP ARP: rcvd rep src 13.13.13.100 aabb.cc00.6510, dst
13.13.13.3 Ethernet0/0
R3#
Nov 22 18:11:17.598: IP ARP: sent req src 13.13.13.3 aabb.cc00.6700,
dst 13.13.13.100 aabb.cc00.6510 Ethernet0/0
Nov 22 18:11:17.598: IP ARP: rcvd rep src 13.13.13.100 aabb.cc00.6510, dst
13.13.13.3 Ethernet0/0
Nov 22 18:11:17.598: IP ARP: creating entry for IP address: 13.13.13.100,
hw: aabb.cc00.6510
R3#
On 11/22/06, Topass Mustpass <ccie_certain@hotmail.com> wrote:
>
> Please i need help from you guys.
>
> My orgainisation is a Finacial institution with over 140 branches with 7
> service providers providing links.The 140 branches were distributed btw
> the
> 7 vsat providers terminated at the datacenter.Each provider has the
> remote
> branches terminated on a router before entering a core switch.so making 7
> core router routers.There is a finacle application server being the core
> banking application server.Route of each branches were added on the server
> pointing to ip address of each provider's core router as its gateway for
> remote branches to communicate with that server.
>
> Recently last 7 days i just discovered that braches will refuse to access
> that server despite that can ping the gatway in datacenter core router .I
> found out that once i clear the ARP cache on the core routers in
> datacenter
> they remote branches will continue to communicate with the server.
>
> So i now need to clear ARP cache every 3o mins on the routers for them to
> ping the servers.
>
> please try and help me out.please what is going wrong and what can i do?
>
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This archive was generated by hypermail 2.1.4 : Fri Dec 01 2006 - 08:05:48 ART