RE: ebgp vs ebgp multihop [7:66127]
One reason I can think of is that ebgp-multihop (in the lab) allows me to peer to a remote router's loopback interface. This can somewhat overcome situations wherein the main link can be down, but there still exists another link in which I can keep the neighborship up for whatever reason. As BGP runs on top of TCP, peering will still be up as long as there is another path to the remote router's loopback interface. ie. multi-homed BGP applications. I'm sure there are some more advantages and disadvantages of using such design in the real world. But I would guess that the guys from Cisco (or the geniuses who designed BGP), put ebgp-multihop in there as a feature not to be mandatorily used, but to overcome some unavoidable situations. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=66128t=66127 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: ebgp vs ebgp multihop [7:66127]
wrote in message news:[EMAIL PROTECTED] Hi all, i would like to know your opinion/experience about using ebgp multihop comparing with ebgp. AFAIK, ebgp was designed for directly connected only and using ebgp multhop is not recomended for ISP envy. would you please tell me the caveat of using ebgp multihop for ISP envy. While I don't know about the ISP environment, I've done several BGP labs with other folks in different parts of the country. EBGP Multihop is a necessary part of this, obviously. I suppose in real world the advantage is that you can peer loopbacks, rather than just the physical interfaces. Another thing that comes to mind, applicable to ISP and corporate environments, is that your iBGP routers can be located in different parts of your network, eliminating the need for physical adjaceny. Any comments would be appreciated. regards hendro mail2web - Check your email from the web at http://mail2web.com/ . Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=66154t=66127 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: ebgp vs ebgp multihop [7:66127]
I do this every day for customers.They have 2 or more T-1's and would like to make sure that the circuit stays up if one of the T's go downAND they want to load balance their trafficUsing lo0 and ebgp multihop and using CEF with per-packet or per-destination achieves this. From: The Long and Winding Road Reply-To: The Long and Winding Road To: [EMAIL PROTECTED] Subject: Re: ebgp vs ebgp multihop [7:66127] Date: Tue, 25 Mar 2003 14:48:53 GMT wrote in message news:[EMAIL PROTECTED] Hi all, i would like to know your opinion/experience about using ebgp multihop comparing with ebgp. AFAIK, ebgp was designed for directly connected only and using ebgp multhop is not recomended for ISP envy. would you please tell me the caveat of using ebgp multihop for ISP envy. While I don't know about the ISP environment, I've done several BGP labs with other folks in different parts of the country. EBGP Multihop is a necessary part of this, obviously. I suppose in real world the advantage is that you can peer loopbacks, rather than just the physical interfaces. Another thing that comes to mind, applicable to ISP and corporate environments, is that your iBGP routers can be located in different parts of your network, eliminating the need for physical adjaceny. Any comments would be appreciated. regards hendro mail2web - Check your email from the web at http://mail2web.com/ . _ Help STOP SPAM with the new MSN 8 and get 2 months FREE* http://join.msn.com/?page=features/junkmail Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=66164t=66127 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
