BGP flapping while peering with Juniper - Hold timer expired error

[Ondrej Zajicek]

On Wed, Sep 04, 2013 at 11:43:31PM +0800, Jimmy Halim wrote:
> Hi guys,
> 
> I had problem bringing up 1 IPv6 BGP neighbour after migration from OpenBGPd to BIRD. The session keeps flapping and no routes have been exchanged as well.
> 
> The log in BIRD:
> Sep 5 00:13:38 ixrs2 kernel: MD5 Hash mismatch for (2001:0de8:0005:0000:0000:0000:1234:0001, 56545)->(2001:0de8:0005:0000:0000:0002:1234:0002, 179)
...
> Have you guys encountered the same issue before? I have confirmed that
> the MD5 password is matching. The same neighbour has BGP session to my
> other BIRD server and the session is running fine! The next step from my
> side probably is to remove the MD5 password on my end and on other end.

Hello

BIRD is running on Linux or on BSD? The second working session also
uses MD5 password? The other BIRD server uses the same kind
of hardware (esp. the network card)?

We heard about such kind of problems with MD5 checksums, but as it is
handled almost completely by OS kernel, i would guess that the problem
is there (probably in some network card IP offloading or in some firewall
rules).

-- 
Elen sila lumenn' omentielvo

Ondrej 'SanTiago' Zajicek (email: santiago at crfreenet.org)
OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net)
"To err is human -- to blame it on a computer is even more so."
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