Spanning VLANs/Subnets over a WAN link for Server Clustering (HOWTO)
I would like to cluster 2 SUN servers which are on different buildings. The two buildings are linked with a WAN connection over fiber.
The Clustering Software on the Servers (Sun CLuster 3.2) has a requirement that the two nodes/servers need to be in the same subnet for the cluster to work. My question is; how can i span a VLAN/Subnet across the two buildings over a Layer 3 connection (WAN link)?
Basically you transport all ethernet/dot1Q frames between two ethernet ports over an IP or MPLS network.
Afaik MPLS will give better performance but also requires and end-to-end label switched path, i.e. changes in the transport network. L2TPv3 uses IP to tunnel the L2 frames, so in principle only endpoints need to be configured. Both technologies might give you MTU related issues because of the additional overhead, which need to be addressed in the transport network. So check the intermediate network (especially all sort of ethernet interfaces) for support of jumbo frames.
A2: you can avoid this for now using A1 ;-)
A3: DWDM across the fiber and real VLANs end-to-end. Or simple GE over the fiber with a mixture of routed and switched VLANs through a L3 switch. But A3 is just a wild guess without details regarding your topology and hardware.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.