A noob issue about recursively routed

Unanswered Question
Jul 6th, 2009

Hi all,

Here's my configuration.

r2#show ip route

Gateway of last resort is not set is variably subnetted, 2 subnets, 2 masks

C is directly connected, Serial1/0

S [1/0] via


r2#show run int s1/0

interface Serial1/0

ip address

encapsulation frame-relay




r2#show run | include ip route

ip route



Let's ping at r2, can r2 get the icmp reply from ?



I have this problem too.
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dario.didio Mon, 07/06/2009 - 00:18


no, your ping will not work.

If you remove the static route, it will work.

reason is that if you ping, the static route will be used because it is more specific than the connected route. (sh ip route

The destination for the static route is again, and the story goes on...

Why do you want to configure it like this?



wandering_997 Mon, 07/06/2009 - 00:50

Hi Dario,

Thank you for your reply.

Yes, you're right, it does't work.

This is not a requirement, but a accident of my colleague.

I didn't believe that untill I made a lab.

I'm wondering why it exists? It looks like a serious bug of routing mechanism.

And I made a /32 route to a host in the same segment on my laptop system, the host can be pinged successfully.


[email protected]:~> route -n

Kernel IP routing table

Destination Gateway Genmask Flags Metric Ref Use Iface UGH 0 0 0 eth0 U 1 0 0 eth0 U 0 0 0 lo UG 0 0 0 eth0

[email protected]:~>

[email protected]:~> ping -c 1

PING ( 56(84) bytes of data.

64 bytes from icmp_seq=1 ttl=64 time=0.735 ms

--- ping statistics ---

1 packets transmitted, 1 received, 0% packet loss, time 0ms

rtt min/avg/max/mdev = 0.735/0.735/0.735/0.000 ms

[email protected]:~>

Why? Is IOS different from Unix like system?



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