Weird ARP problem

Unanswered Question
Aug 27th, 2007

I just installed a device in my vlan 6

When I connect my laptop in vlan 6 I can access the device.

When I connect my laptop in vlan 1 I cant access the device.

If I add a static arp in my core switch:

arp 0020.4a52.15f3 ARPA

then it start to work.

After that even if I remove the line in config it will work until I reboot the core switch even if I do a:

clear mac-address-table

clear arp-cache

Any suggestion were to start looking ?

I have this problem too.
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fred.mancen Mon, 08/27/2007 - 11:32


did you checked the routing settings among the existing VLANs? It seems a problem with routing, since you connect on the same VLAN and can reach the device and in another VLAN you can?t. Try to check the settings on the L3.


msaulnier Mon, 08/27/2007 - 11:34

I don't see how it could be a routing problem.

I can connect to the device after I make a static arp entry. So the routing is working.

msaulnier Thu, 08/30/2007 - 05:06

How can you remove a static ARP int the memory without rebooting the switch ?

msaulnier Thu, 08/30/2007 - 12:31

I checked the gateway on the device and it is set properly. But If it works after adding the static arp I don't see how it could be the gateway.


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