Disclaimer: I've only read about this. If you can do H-VPLS with u-PE/n-PE Cisco talks about "EE H-VPLS Pseudo-n-PE Redundancy" being a way to avoid some of the loop-avaoidance issues.
See this link: http://cisco.com/en/US/products/hw/routers/ps368/products_white_paper09186a00801f6084.shtml Looks like an interesting idea to me. Anyone actually doing this? Tim:> On 7/27/07, Peter Krupl <[EMAIL PROTECTED]> wrote: > Hi, > > I have looked at this issue too, but your solution has one major flaw... > > Q: > What would happen if the VPLS circuits go down in the core network, > And then came back up ? > A: You have a loop, until spanning tree notices.... > > Flexlink seems more usable.... > > > Med venlig hilsen/Kind regards > Peter Åris Krüpl > Netværksspecialist > > -----Oprindelig meddelelse----- > Fra: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] På vegne af [EMAIL PROTECTED] > Sendt: 25. juli 2007 17:33 > Til: [EMAIL PROTECTED] > Cc: [email protected] > Emne: Re: [c-nsp] Dual-Homed VPLS > > Hi Eric, > > Exactly. > > As PE would forward Spanning tree BPDUs transparently, I am considering > STP is also an option to block a link. > For example: > > > CE1-A_(fa-1/1)--------------- PE1=======PE2---------CE2-A (STP ROOT) > | \ / > (fa-1/2) \ / > |_________________________ \ / > PE3 > > > Considering CE2-A is STP root, CE1-A would receive BPDU from both > interfaces, would choose fa1/1 as RP and would block fa1/2. > What do you think? > > > I hope we receive more feedback. > > > Best Regards, > Alaerte > > > > -----Original Message----- > From: ext Eric Helm [mailto:[EMAIL PROTECTED] > Sent: Wednesday, July 25, 2007 12:15 PM > To: Vidali Alaerte (NSN - BR/Rio de Janeiro) > Subject: Re: [c-nsp] Dual-Homed VPLS > > Alaerte... > Are you talking about dual-homed VPLS endpoints? If so, I'd be curious > to hear what suggestions you receive for this topic. When I looked into > doing this, it seemed that using Flex-Links was the only viable > solution. > > Regards, > > /Eric > > [EMAIL PROTECTED] wrote: > > Hi, > > > > Do you indicate any reference for this topic? > > > > I tried some books like "MPLS Configuration on Cisco IOS Software" > > (pretty good book) by Lancy and Umesh, but it only touch the subject. > > > > Tks, > > Alaerte > > _______________________________________________ > > cisco-nsp mailing list [email protected] > > https://puck.nether.net/mailman/listinfo/cisco-nsp > > archive at http://puck.nether.net/pipermail/cisco-nsp/ > > > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
