Arp Entry for a route not phasing out

Unanswered Question
Jul 30th, 2007
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I am facing am issue of arp entry not phasing out.

When my Primary Link goes down, I have a deafult route ( backup route ) that comes into play via Fa0/0. I am learning this route via EIGRP.It works fine

But whenever my primary link ( On Serial ) comes back up, I see problem that there are certain routes which are not reachable ( Though I can see the routes learnt from Primary path via BGP now) . I have seen that there is an ARP entry which stays for these routers via FA0/0 ( backup ) and we need to clear them manually.

I need to know if smeone has come across this issue ?

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mohammedmahmoud Mon, 07/30/2007 - 02:27
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Hi Arshad,

Are both routes learned via EIGRP ?


Mohammed Mahmoud.

arshad_usmani Mon, 07/30/2007 - 02:52
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Hi Mohammed

No. The Primary Route is learnt via BGP. Now when primary route gets unavailable then we have a backup route which is learnt via EIGRP.

Now when by Primary link comes backup, I can see the route available back again via BGP but the packets are drop due to this ARP entry not phasing out.

I am running CEF globally


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