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ovt Bronze
Bronze

DMVPNs reliability

Hi!

Just wondering if anyone is using DMVPNs? How do you cope with Hub failures? It seems that in all 12.3 IOSes Spokes do not answer NHRP "Resolution Requests" from the Hub when the Hub reboots (or "clear ip nhrp" is issued). This is unrelated to BugID CSCed64463. Consequently it takes up to 1/3 of "ip nhrp holdtime" (which is 2 hours by default!) for Spokes to Register again on the Hub with "Registration Request". Until then the traffic doesn't pass.

Are there any workarounds?

2 REPLIES
New Member

Re: DMVPNs reliability

the hub failure needs to be detected in Layer 1 troubleshooting

New Member

Re: DMVPNs reliability

Keepalives -

a. Tunnel

b. ISAKMP

c. IPSEC

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