Hi Luca, > MX1---------darkfibre----------MX2 > | | > | | > MX3---------darkfibre----------MX4 > > So above you see that there are dual links which will create a loop. > > How does VPLS handle these types of topologies? Do I need to just use > spanning tree and have one link in blocking? > Or perhaps use MSTP and send some VLANs down one link and some down the other? > I will be spanning around 1000 VLANs across these links. They are 10Gb links, > so it seems a shame to have one in a blocking state.
VPLS will handle the above just fine using full-mesh and split-horizon - eg: A PE will never forward frames received on one LSP to another LSP. The dual-homing from your MXs (assuming they are PE) to your CE/Edge devices is where you'll need to be concerned about loops. There are mechanisms built into VPLS to deal with this though. A quick search on "junos vpls multihoming" provides plenty of detail on the knobs you'll need: http://www.juniper.net/techpubs/en_US/junos12.2/topics/example/vpls-multihoming-convergence-example.html https://www.juniper.net/techpubs/en_US/junos12.2/topics/task/configuration/vpls-multihoming-bgp-signaling-solutions.html I've not actually tried dropping in MC-LAG into a VPLS but I can't see why this wouldn't work. Ben _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
