[f-nsp] XMR Software Upgrade Path from 4.0.1a

[Abello, Vinny]

Thanks for the input, Igor.

We specifically have issues with path-mtu-discovery being broken in IPv6 due
to the XMR not responding with icmp unreachables with IPv6. This is a known
issue according to Brocade and is fixed in later releases.

We also recently had a very odd failure on two of four XMR's running the
same code within a couple of hours of each other, thousands of miles apart.
I unfortunately wasn't able to get enough information about what caused the
failure when it was happening, but the XMR's RP seemed to stay alive yet
line cards stopped forwarding traffic and some routing protocols were
flapping causing churn. For the most part, the IGP and iBGP sessions stayed
established which was really weird. No access to the devices were possible
via any means including connecting from an adjacent device. A hard reboot
brought them back online again. It's odd we saw that issues on two of them
within hours of each other but no others were affected. This also happened
early on January 1st which is a little weird.

NSF support (or whatever Brocade calls it) on IS-IS is a new feature in 5.1
that I'd like to have support for. It would complement my Cisco's already
supporting this for quite some time now and make an RP failover much less
noticeable.

Vinny Abello
Network Engineer
Dell | Physician Services
office +1 973 940 6125
mobile +1 973 868 0610
vinny_abello at dell.com


-----Original Message-----
From: foundry-nsp-bounces at puck.nether.net
[mailto:foundry-nsp-bounces at puck.nether.net] On Behalf Of Igor Ybema
Sent: Monday, January 17, 2011 4:02 PM
To: foundry-nsp at puck.nether.net
Subject: Re: [f-nsp] XMR Software Upgrade Path from 4.0.1a

Hi,

We at Oxilion, dutch based hosting provider, are running 4.0.0a for
about 2 years now without any problems. Basic functions like OSPF,
BGP, IPv4/IPv6 dualstack etc.

No need to upgrade to 5.1 here yet.

regards, Igor
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