Just looking to see if there are any known issue's here. Really odd one. Was having an aging Enterasys stack replaced in a remote office with a HP 2920. Site has a Sonicwall NSA 4500. All my other sites have comparable hardware (NSA's, Procurves/HC3). Note: No running-config below, as I did not grab before taking offline.
Quick Topology (for sake of simplicity, this setup as tried):
WAN VLAN (VLAND ID 10): 192.168.200.0/24
HP 2920 - 192.168.200.1
Sonicwall - 192.168.200.2
Cisco Router for MPLS - 192.168.200.254
VLAN interface IP on HP: 192.168.201.1
Devices on the Data VLAN point at 192.168.201.1 for gateway.
ip route 0.0.0.0 0.0.0.0 192.168.200.2
ip route x.x.x.x 255.255.255.0 192.168.200.254 (where x.x.x.x is the remote subnets across my MPLS)
IP routing is enabled.
All tagging is assumed correct.
My end users cannot reach the internet. They can reach anything that is on a separate subnets* on the HP. They can traverse the MPLS to other sites via the 192.168.200.254 gateway. So we are routing on the HP, but not to the Sonicwall?
Sonicwall does have the proper return routes for the subnets, pointing back at 192.168.200.1 (ie, 192.168.201.0/24 uses 192.168.200.1). Also, the HP has the same IP as the old Enterasys.
Reboots of the HP and sonicwall will return internet access for a short period
Odd entry in the HP's arp table :
(with no port)