Hi,
My network consists of 2 sites (A & B). Both sites each have 2 units of Cisco 6506 switches. Between Core1 & Core 2 both are running HSRP.
All the active gateways are at Core 1 & standby at Core 2. Both sites are connected via DWDM which physically connected only to both Core 2 switches via Vlan X. There are no hsrp for this vlan X. All routes are learned via EIGRP.
Lately, User from site A finding intermittent accessing servers at Site B.
The traceroute seems to be very weird.
When i can ping the server at B - traceroute reach the remote site B.It look like below.
User PC at Site A reach C1 (user gateway) then site A C2 (hsrp standby gateway) then to Site B C2 ( vlan X ) last Site B C1 (server gateway)
When i cant ping the server at B - traceroute does not even reach the Site A C2, it stop at C1 gateway or even sometime it *** from User PC.
It look like it lost the routes for a moment.
But when i checked the routing its always there and tracing between Core Switches from Site A user gateway to the site B server gateway, there are no intermittent.
What could cause this issue?
Thank You.
