09-17-2008 09:26 PM - edited 03-03-2019 11:35 PM
Hi,I wantto use LAM (Local Area Mobility)
in my network to make it possible that the can use Hosts with static IP-Addresses on different places in the network.
Has anybody experience with LAM on sites with redundant Routers. (topology on every site:2 redundant Routers running HSRP(not for LAM) an one L2-Switch where routers and Hosts are connected)
If the former active router fails the Mobile Host in the local Network does not recognize this and is in my opinion not able to communicate via the Router until he did again an ARP-Request for its default-GW and the now active Router answers this request with proxy-ARP.
This can need a lot of time, depending of the arp-cache timeout of the host.
Any ideahow to prevent this ?
Kind Regards
Hubert
11-07-2008 01:41 AM
hallo hubert, hast schon eine lösung?
11-16-2008 10:07 PM
ne Hannes , leider nicht, andre Frage hast du schon mal mulilink-multichassis ppp konfiguriert für die Verbindung von 2 Standorten mit redundanten Routern ? geht das ?
11-17-2008 12:28 PM
hab ich noch nicht gebraucht. ob das geht ist eine gute frage? hast hier nichts dazu gefunden?
11-17-2008 11:00 PM
Hi Hubert,
Have you decreased (Mobile ARP timers keepalive)?
The mobile ARP entries can be configured to time out more quickly. The LAM feature allows for the configuration
of a keepalive time and a hold time for mobile ARP entries on an interface. When using LAM, a router periodically checks
to ensure that the mobile host is still there by querying it with ARP requests. This ensures that the redistributed route
is still valid. The mobile host ARP keepalive times can be altered with the command:
ip mobile arp timers [keepalive minutes] [hold-time minutes]
Please refer to the bellow link for further details:
http://www.cisco.com/warp/public/cc/pd/iosw/ioft/lam/tech/lamso_wp.pdf
HTH
Mohamed
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