5300 routing

[rob misz]

Please forgive im new to networking. We recently leased metro Ethernet. We have two locations (Site A, Site B) with 5300 series switches Routing is enabled at site A and site B. we have a server VLAN and PC VLAN at both sites. The uplink ports to the metro E are tagged for both VLANs. We have servers at both locations. Lately we’ve been having latency issues on the server VLAN.  Should I create a new VLAN that has the unlinks port untagged to the metro E network and create static routes to each location

Site A:

vlan 12

   name "PC"

   untagged A8-A16,A19-A23

   ip address 192.168.2.254 255.255.255.0

   ip helper-address 192.168.99.5

   tagged B15-B16,C1,C4,D4

   ip igmp

   exit

vlan 13

   name "Servers"

   untagged B3-B6,B8-B11,B13

   ip address 192.168.99.254 255.255.255.0

   tagged B15,D4

   ip igmp

   exit                        

 Site B:

vlan 13

   name "Servers"

   untagged B5,B13-B14

     tagged B16

   ip igmp

   exit

vlan 12

   name "PC"

   no ip address

   tagged B12,B15-B16

   ip igmp

   exit

[Matcol]

Generally, if you have a new site, I find it best to design the subnets for that site as independent ones - then it can function independently of Site A if required.

As you say both routers have routing enabled, it seems even more obvious that SIte B's local hosts have their default gateway locally, with routing to get them off-site.

However, often a link between sites used by *servers* requires layer2 connectivity for the server subnet (VMotion, etc...).

In any case, "latency issues on the server VLAN"?

 - Sounds like a Server Team trying to pass off their problems as being a "network problem".

--> Work with them to pinpoint the exact location of the issue: what you will be trying to do is prove exactly which server/switch interfaces are on the path of the "latency issues" and demonstrate that each relevant switchport is always running with lots and lots of spare capacity.