North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: BGP 4, auth error question.
On Fri, Sep 18, 1998 at 05:14:28PM -0400, Chris Morrell had most eloquently written: > > The Cisco is probably running IOS 11.1(20)CC. This version has a bug in > it that assumes the other side will understand its request to negotiate > MBGP (which there is no RFC for and which seems to be Cisco proprietary at > this point). > actually, i think the bug relates to Capabilities Negotiation, which is a draft RFC at this point. there is great irony in capabilities negotiation causing a BGP session to reset because it was created specifically to avoid connection resets from unknown Optional Parameters in an OPEN message. > The BGP session will come up with a Cisco which can't run MBGP, but it > doesn't seem to work for other routers. (notably routers using gated > derived code. > > Changing the IOS will fix the problem, but the better short term thing to > do is to have the Cisco side add the following line to their BGP > configuration for your connection: > > neighbor AA.BB.CC.DD dont-capability-negotiate > the real bug is not that cisco implemented capability negotiation incorrectly, but that it is on by default long before anyone else has implemented it. > If you want more details and the actual Cisco Bug ID, I can find that for > you. > > Chris > ben
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