[Xorp-users] BGP crash

Arsi Antila bbb999 at zerodistance.fi
Mon Dec 3 02:21:00 PST 2007


Is the following a known problem in XORP?

Note: this was shown to me by someone else. I didn't test this myself,
so some of the details may be incorrect.

XORP crashes when the same set of BGP routes is advertised from two
different routers connected to the same interface and the winning route
changes. Tested with VLANs, if-aliases and plain interfaces. Results do
not vary.


For example, configuration of the network is as follows:

- device under test (Linux/Debian, XORP) and five simulated routers 

- AS 1 is advertised to ports eth1 and eth2 

- AS 2 is advertised to ports eth1 and eth2 

- AS 3 is advertised to port eth3

- Policy rules so that AS 2 routes are not advertised to AS 1

BGP process dies when one of the routers in AS 2 goes down and then up
so that the primary route in AS 2 changes.


Regards,
A.A.



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