RCP connection hungs when source and destinations are in different vlan

Unanswered Question
Sep 9th, 2009

Hello Guys,

We are having a 6500 switch with sup 720. the issue which we are facing is RCP application hungs when source and destination devices are in different vlan.

And it works fine if both are in same vlans.

Could anybody help me to solve this

I have this problem too.
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Giuseppe Larosa Thu, 09/10/2009 - 08:55

Hello Harish,

not sure what do you mean with RCP I guess you mean remote copy protocol.

usually what can change in using two devices in different IP subnets is that some mechanism of discovery may fail if it is based on broadcast this is typical of MS networking.

And in that case the ip helper-address can help.

But RCP is based on TCP and it is used on unix systems.

A possible issue may be that one unix server thinks the other device is in the same IP subnet (wrong netmask).

This issue can be addressed using ip proxy-arp on SVI vlan interfaces of C6500.

A packet capture may help in understanding what is the problem.

Hope to help

Giuseppe

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