static route, next hop vs interface question.|
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Posted by on January 15, 2006, 6:17 pm
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ip route 172.20.21.50 255.255.255.240 ethernet 0 I saw the trace go to the next hop, but no further. after changing from the outbound interface to the next hop routers interface IP, ip route 172.20.21.50 255.255.255.240 142.1.11.45 I had no problem reaching the destination. Does anyone know why? Thanks crzzy1 | |||||||||||||
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Posted by Walter Roberson on January 15, 2006, 6:28 pm
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Posted by on January 15, 2006, 6:31 pm
Please log in for more thread options I put in a static route
ip route 172.20.21.50 255.255.255.240 ethernet 0 I saw the trace go to the next hop, but no further. after changing from the outbound interface to the next hop routers interface IP, ip route 172.20.21.50 255.255.255.240 142.1.11.45 I had no problem reaching the destination. Does anyone know why? Thanks crzzy1 correction to the above this is what I used to reach my destination (172.20.21.50) ip route 172.20.21.32 255.255.255.240 e0 (Doesn't work) ip route 172.20.21.32 255.255.255.240 142.1.11.45 (works) | |||||||||||||
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Posted by Walter Roberson on January 15, 2006, 6:40 pm
Please log in for more thread options >correction to the above this is what I used to reach my destination
>(172.20.21.50) >ip route 172.20.21.32 255.255.255.240 e0 (Doesn't work) >ip route 172.20.21.32 255.255.255.240 142.1.11.45 (works) As I said... proxy arp. When you set an explicit next hop, your router is going to arp for that next hop, and that device will answer conveying back its MAC address. When you set the next hop as your current interface, then your router is going to ARP for the IP of the destination that is in the packet, and unless the remote router knows that it is to answer for -all- unknown IP address ranges (i.e, "proxy arp") then that router isn't going to answer (and nothing local will either because it isn't the IP address of anything local...) | |||||||||||||
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Posted by on January 15, 2006, 8:31 pm
Please log in for more thread options I looked it up.
You are correct, the next hop is a foundry router, and the proxy arp is disabled by default. Nice work... Thanks, crzzy1 | |||||||||||||
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>ip route 172.20.21.50 255.255.255.240 ethernet 0
>I saw the trace go to the next hop, but no further.
>after changing from the outbound interface to the next hop routers
>interface IP,
>ip route 172.20.21.50 255.255.255.240 142.1.11.45
>I had no problem reaching the destination.
>Does anyone know why?