I'm not as technical as most of the guys on this list, so don't put too much stock in my response, but I would of thought what you're trying to do is not technically feasible on a Cisco router.
IRB allows you to bridge/switch packets between two routed interfaces. The issue I see is that the serial interfaces are just that. . . serial. There's no Ethernet protocol running on the interface, so no MAC addresses on those pt-to-pt links and therefore no bridging that can be performed. I would think you'd instead need some type of layer 2 box that can just do protocol conversion -- that is, a box that can strip the payload from the Ethernet frames and wrap it in a TDM header (add all the necessary padding to adjust for timing on the TDM side of the network) and put it on the wire. I think the Anda EtherReach boxes do this. I could definitely be wrong here, so I'm interested to see what type of responses you receive. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Joe Freeman Sent: Monday, December 27, 2010 10:52 PM To: Cisco-nsp Subject: [c-nsp] Bridging ethernet to MLPPP I've got a situation where a customer is having to relocate from one facility to another a few miles away. This customer has a 100Mb metro ethernet connection at the old location, and can't get it moved for several months. To help them out, we're trying to setup a pair of 3620's that we had with wic-1dsu-t1's (4 ea router) to bridge the metro e across a multilink ppp group and back to an ethernet connection at the new site. For some reason, I can't get this to work. Here's the config I'm using on each side- bridge irb bridge 1 protocol ieee int serial 0/0 encaps ppp multilink-group 1 int serial 0/1 encaps ppp multilink-group 1 int serial 1/0 encaps ppp multilink-group 1 int serial 1/1 encaps ppp multilink-group 1 int multilink 1 encaps ppp bridge-group 1 int fa0/0 bridge-group 1 So I figure I'm either missing something simple, or something major, like it's just not possible with this hardware. Either way, I'd appreciate whatever thoughts anyone has. Thanks- Joe _______________________________________________ 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/
