Segment Routing for L2VPN?
Hello! I've been doing some reading recently on Segment Routing. By all accounts, it seems that the (only?) implementation for SR supports L3VPN. Am I dumb and just missing the L2VPN bits, or is L3VPN simply the extent of the first generation? Sent from my iPhone
Re: Segment Routing for L2VPN?
No, it works with L2VPNs also. Outer label is going to be SR label and inner label is your L2VPN label. Cheers, -Mohan On Sun, Sep 20, 2015 at 3:23 PM, Jason Lixfeld wrote: > Hello! > > I've been doing some reading recently on Segment Routing. By all accounts, > it seems that the (only?) implementation for SR supports L3VPN. Am I dumb > and just missing the L2VPN bits, or is L3VPN simply the extent of the first > generation? > > Sent from my iPhone
Re: Segment Routing for L2VPN?
Hi, In most well designed IP routing stacks the way to get to a labeled (tunneled) next hop is decoupled from a service, so if a service requires such next hop it is upto (usually RIB) to return one (best, multiple might exist) which would be used for forwarding. If it is a Segment Routed one so it will then be used. Cheers, Jeff -Original Message- From: Mohan Nanduri Date: Sunday, September 20, 2015 at 12:59 PM To: Jason Lixfeld Cc: "nanog@nanog.org" Subject: Re: Segment Routing for L2VPN? >No, it works with L2VPNs also. Outer label is going to be SR label and >inner label is your L2VPN label. > >Cheers, >-Mohan > > >On Sun, Sep 20, 2015 at 3:23 PM, Jason Lixfeld wrote: >> Hello! >> >> I've been doing some reading recently on Segment Routing. By all >>accounts, it seems that the (only?) implementation for SR supports >>L3VPN. Am I dumb and just missing the L2VPN bits, or is L3VPN simply >>the extent of the first generation? >> >> Sent from my iPhone
Re: Segment Routing for L2VPN?
It depends on what type of L2VPN we are talking about. If we are talking about VPLS (where we learn from the data path) changes are needed in order to make it work with segment routing. Basically, the VC label must be assigned and used in such a way that it indicates not only the service for the packet, but also the PE from which it originated. That is because with SR, we would have lost the path (PW) that the packet used to get to the destination PE. If we are talking about BGP E-VPN where data path learning is not used, then it should work with segment routing without any changes. Anoop On Mon, Sep 21, 2015 at 11:32 AM, Jeff Tantsura wrote: > Hi, > > In most well designed IP routing stacks the way to get to a labeled > (tunneled) next hop is decoupled from a service, so if a service requires > such next hop it is upto (usually RIB) to return one (best, multiple might > exist) which would be used for forwarding. If it is a Segment Routed one > so it will then be used. > > Cheers, > Jeff > > -Original Message- > From: Mohan Nanduri > Date: Sunday, September 20, 2015 at 12:59 PM > To: Jason Lixfeld > Cc: "nanog@nanog.org" > Subject: Re: Segment Routing for L2VPN? > > >No, it works with L2VPNs also. Outer label is going to be SR label and > >inner label is your L2VPN label. > > > >Cheers, > >-Mohan > > > > > >On Sun, Sep 20, 2015 at 3:23 PM, Jason Lixfeld wrote: > >> Hello! > >> > >> I've been doing some reading recently on Segment Routing. By all > >>accounts, it seems that the (only?) implementation for SR supports > >>L3VPN. Am I dumb and just missing the L2VPN bits, or is L3VPN simply > >>the extent of the first generation? > >> > >> Sent from my iPhone > >
