2011/10/11 Humair Ali <[email protected]> > Hi Keegan > > As far as I know , in VPLS, it uses split horizon as loop avoidance > mechanism , and you should not see any loop occurring in a VPLS > setup,(pending the rest of config is correct) >
Yes it is BGP signaled so that will solve the loops on the core facing interfaces. > > The only way you could have a loop in VPLS is when you start having your CE > dual homed , where in that case you need to either configure STP , or you > could use the primary/backup knob to define which PE is the primary and > which is the back up. > STP doesn't seem to work here. Only cisco PVST which doesn't help me on an EX4200. Primary/backup has to do with multihoming which works as well. I'd like to know why this works when the site-id's are the same and why the l2forwarding instance doesn't work. I'm also curious why cisco pvst works and none of the standards based protocols. > > On 11 October 2011 20:19, Keegan Holley <[email protected]> wrote: > >> I'm trying to get my handle on vpls loop avoidance and I can't remember >> the >> default behavior regarding site-id's and node-id's. I remember reading >> about it in one config guide or another but I can't seem to find it now. >> I'm trying to remember if broadcast, multicast and unknown unicast is >> flooded between PE router interfaces with the same site id's and maybe >> just >> some general guidelines on their behavior. I'm trying to understand best >> practices for loop avoidance. It seems to loop with any standards based >> STP >> protocol if two or more interfaces are connected to routers configured >> with >> the same site-id. The behavior I see seems to be the opposite of what the >> website says. >> >> >> http://www.juniper.net/techpubs/en_US/junos10.4/topics/concept/vpn-configuring-ethernet-switch-as-the-ce-device.html >> _______________________________________________ >> juniper-nsp mailing list [email protected] >> https://puck.nether.net/mailman/listinfo/juniper-nsp >> > > > > -- > Humair > > _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
