Default Route

Nov 05, 2005 3 Replies
B

I'm in New Orleans and just got my network back up today after Hurricane Katrina. The location where my 3640 router formerly connected to was under water so my ISP re-routed all these circuits to Atlanta. Now my 3640 is connected to a Juniper Networks router instead of a 7206.



After they configured my interface on their router, I could ping that interface but nothing beyond it. When I ran a traceroute to my router from outside , it stopped at the ISP's router. The ISP network tech directed me to change my default route from: ip route 0.0.0.0 0.0.0.0 Ethernet0/0 to: ip route 0.0.0.0 0.0.0.0 xx.yy.12.1 1



This solved the problem. Why?



-- Bob Simon remove both "x"s from domain for private replies


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B

Sorry, I forgot to mention that I'm not running any routing protocol; just using static routes.

-- Bob Simon remove both "x"s from domain for private replies

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B

Cisco does proxy ARP by default, Juniper doesn't.

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M

I think this need some more explanation:

When you point your routes to an interface the device will ARP for the address. Other devices, such as firewalls, and routers, with Proxy-ARP disabled, will not reply to such requests. Hence if you specify the IP instead, your setup will work.

HTH Martin Bilgrav

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