North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: A question on CE to PE route exchanges ...
> not be interested. The issue here is that Cisco will tend to > add IGP routes to the default table, not the VPN table. Bad > things ensue. What ... ? For protocols that have been vrf aware routes go into vrfs and not global RIB. Those IGPs would be in shipping images: RIP, OSPF. Very soon also EIGRP & ISIS. Just watch your CPU before using IGPs on a wide scale with tons of customer routes flappoing :). Just not be understood that I recommend the above IGPs :) I am also seeing worldwide the following set of protocols on the PE-CE in order or preference: static, BGP & RIP. R. > Dave Israel wrote: > > Oops... I answered this privately, assuming NANOG at large would > not be interested. The issue here is that Cisco will tend to > add IGP routes to the default table, not the VPN table. Bad > things ensue. > > I was actually referring to the CE interface address; peering > with the CE's loopback is, IMHO, more trouble than its worth > unless you have multiple connections on the same router. But > as long as the address you are peering with is in the private > routing table, you're fine, regardless of whether or not it is > also in the default table. > > I cannot speak to the "most common;" I think it is too early > to tell. But we are tending towards static routes (nice and > stable, without the chance of the other guy breaking you) > and BGP (which is already designed to handle trans-border > communication.) > > I have not tried it, but I would assume the OSPF area "repair" > toys would work nicely over this, if you want an IGP running > across your CE routers. (I'm more of an ISIS guy than an > OSPF guy... anybody know why this would blow up in your face?) > > -Dave > > On 5/19/2001 at 21:14:40 -0700, Elwin Eliazer said: > > > > Even i am interested in knowing the exact issue with > > using IGPs? What is the most common CE-PE route > > exchange behaviour now ... Static routes OR IGP OR > > BGP?? > > > > Dave, are you referring the CE loopback address also > > to be local? > > > > cheers, > > Elwin. > > > > --- Alex Mondrus <[email protected]> wrote: > > > Dave > > > > > > I also like the RFC2547bis. > > > > > > I would like to learn more about your painful > > > experience with IGP in this > > > context. Please elaborate a little bit more on this > > > subject -> Dave Israel > > > wrote "Besides, in at least one major current > > > implementation, your IGP > > > options are painfully limited." > > > > > > http://www.ipoptical.com > > > > > > Thanks in advance, Alex > > > > > > > > > > > > -----Original Message----- > > > From: Dave Israel > > > [mailto:[email protected]] > > > Sent: Friday, May 18, 2001 5:45 PM > > > To: Elwin Eliazer > > > Cc: [email protected] > > > Subject: Re: A question on CE to PE route exchanges > > > ... > > > > > > > > > > > > On 5/18/2001 at 14:13:53 -0700, Elwin Eliazer said: > > > > > > > > Hi, > > > > > > > > RFC2547bis suggests the use of EBGP between > > > > CE and PE routers; Is this a preferable model for > > > > service providers and enterprise customers, when > > > > compared to using IGP? > > > > > > Yes. BGP is designed for network borders. Besides, > > > in at least one > > > major current implementation, your IGP options are > > > painfully limited. > > > > > > > Are there anyone who have deployed this? If so, > > > > how is the EBGP peering setup if the CE router > > > > is with a local (VPN) IP address? > > > > > > The BGP session lives in VPN space, the routes only > > > exist in VPN > > > routing tables. Your CE having a VPN address is > > > really just the > > > natural solution. > > > > > > -Dave > > > > > > ===== > > ------- > > Elwin Stelzer Eliazer > > Corona Networks > > ------- > > > > __________________________________________________ > > Do You Yahoo!? > > Yahoo! Auctions - buy the things you want at great prices > > http://auctions.yahoo.com/ > > -- > Dave Israel > Senior Manager, IP Backbone > Intermedia Business Internet
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