C4507R-E Sup 6L-E 10GE and X4648-RJ45V+E: Strange Port behavior in one VLAN

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Dec 12th, 2013
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Hello all!

I need some help, because i got some really strange thing. We got the 4500 with named SUP and Linecard and around 10 VLANs on it.

If I configure on the linecard a Port into VLAN 500 (access or trunk, doesnt matter) the Host on this port with the correct IP Net gets an error if trying to ping the GW. The Host on this port even cant ping itself.

If you do the Port into another VLAN, in our test VLAN 300, with VLAN300 Subnet, Ping on GW and Ping on itself is working. When you configure the Subnet of VLAN500, but keep the Port in VLAN300, the Host can ping itself and get a correct time out on GW ping. After the Host is configured and you configure the port after into VLAN500, also the Ping to Host and Ping to GW works (which didnt before). If you disconnect / connect the cable, the same problem in VLAN500 is back again.

This whole problem can only be reproduced in this single VLAN 500 - every other VLAN is working normal

Anyone know a Bug to this or had the same problem?

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