routing

[carl_townshend]

Hi all, a quick question, If I have a router on a 10/8 address, would this be able to route say 10.99/16 to another location, or would it just try to route it out the interface with the 10/8 address assigned ?

[Anand Narayana]

Hi Carl,

Once you have a router, you can route to any network having any network class & there is no doubt on it.

[carl_townshend]

Are you sure,As we have a router on a 10.0.0.0/8 address and we cant route to 10.99.0.0/16 from it ?

[mahmoodmkl]

Hi Carl

Do u have any dynamic routing protocol configured between them. if so try disabling auto-sumarization on the routers and check.

Thanks

Mahmood

[carl_townshend]

no there is no dymanmic routing, its all done via static routes, can we do this ?

[mahmoodmkl]

Hi carl,

configs on both ends would help.

can u paste the configs

Thanks

Mahmood

[keduncan]

Your router will try to ARP for the 10.99.X.X out the interface with the 10.0.0.0/8 network assigned to it. If the router with the 10.99.X.X is connected to the 10.0.0.0/8 network and has ip proxy-arp enabled it should proxy the arp request and the packet will be sent out the interface. The router with the 10.99.X.X subnet will send the traffic.

EXAMPLE::

1Router---10.0.0.0--2Router 10.99.0.0

ip proxy-arp

Router 1 will ARP for 10.99.X.X..

router 2 (with IP proxy-arp enabled) will answer with it's arp address.

Router 1 will send the packet to router 2

ROuter 2 will forward the packet

[1000BaseT]

I would use a route-map. Route maps are tricks that cause routers to forward packets to places they would not normally. HTH