Hope someone can help.
We have two Extreme core Blackdiamonds with various flavours of Extreme edge switches. Each core has two mlagg'd connections to edge stack.
Recently the network was reconfigured to put routing on the cores, rather than a FW, and to set up the cores with VRRP. Fairly standard design, one core is master with the other as backup, VIP set as default gateway on the vlans.
Now, since this work has been done an odd issue has appeared. At some point during the day Windows server 2003, Linux and Macs devices can only ping within their own vlan but not outside of it, i.e. another VLAN. Pinging the default gateway (BD1) does NOT respond. However, pinging the second backup BD, not holding the VIP does get a response.
Clearing the arp cache on the devices in question brings the response back. Now, with 2003 it is not a problem. Changed the ARP settings in the registry and messed around a bit and that seems to have sorted it. However, this is not so easy on Linux or Macs.
This is starting to cause a few issues as you can imagine. Has anyone seen this behaviour before and managed to resolve it?
Any help gratefully received.