[f-nsp] Odd MRP problem

[Jan Pedersen]

Hi George,

 

We once had a similar issue, and that was caused by a faulty 4X10G XMR
Module.

 

Have you checked that you have valid PBIF, XPP and XGMAC versions on all
10GE modules in the ring?

 

Can you pass normal (non-mrp) traffic across that ring without problems.
Do you have a topology group and member-vlans attached to that
metro-ring? If yes, double check that the topology group is equally
configured on all nodes.

 

You might want  to enable byte accounting on the MRP master vlan on all
nodes or try the "dm metro-rhp" debug command to get more information
from the nodes.

 

 

Best regards

Jan Pedersen
Senior Network Specialist
D: +45 7730 2932
M: +45 2550 7321



From: foundry-nsp-bounces at puck.nether.net
[mailto:foundry-nsp-bounces at puck.nether.net] On Behalf Of Heath Jones
Sent: 11. september 2010 21:39
To: George B.
Cc: foundry-nsp
Subject: Re: [f-nsp] Odd MRP problem

 

Hi George

 

I'm really quite a newbie when it comes to MRP. RHP rcvd / sent = 8.22
(close to 8). Is that worth noting?

If the ring ID was different on all 4 devices, not converging so sending
out both interfaces, that would mean that each device should show 8
times(ish) the figure of what is sending out??

 

Packet captures might be the way to go, if we can find the protocol spec
from foundry..

 

Heath

On 11 September 2010 20:02, George B. <georgeb at gmail.com> wrote:

See this diagram for reference:

http://tinypic.com/r/kb93lj/7

This is pretty simple.  I have one vlan in an MRP ring through 4 MLX
units.  I configure the master, and it works as expected.  I then
configure the members.  The problem is when the last "member"
(non-master) is configured in the ring, the master begins to receive
thousands of RHP and TC RBPDUs per second.  It doesn't matter which one
is the last member configured but as soon as I enable RHP on that last
member, the count of RHP and TC RBPDUs goes haywire.  Here is what my
master currently shows:

RHPs sent            RHPs rcvd            TC RBPDUs rcvd
509883               4193162              3684318

As you can see, it has sent about a half a million RHPs but received
over 4 million of them!

Only one unit is configured as "master".  As long as I have MRP
unconfigured on one of the members, the ring works as expected. There is
no spanning tree of any sort running on that vlan.  I am just in awe of
how RHP packets can seemingly be created in the network somewhere at
such an amazing rate!

Anyone else seen anything like this?  It is just plain wacky!

George


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