Re: [mpls-linux-general] cisco

[James R. L. <jl...@mi...>]

On Thu, Dec 13, 2001 at 11:15:24AM +0100, Kauder Thorsten wrote:
> Hi Jim,
> I'm testing the LDP now against a Cisco Router.
> No Session is established, sorry.
> I turned on full tracing and sniffed using ethereal.
> The Cisco doesn't send a configuration sequence number (TLV)
> LDP_Linux therefor doesn't accept the Hello-packets.
> 
> If I understand RFC 3036 right the CSN is optional !!!

You are correct it is optional.    I'm not sure why it is failing.

To make sure the failure if due to no CSN, add some debuging to:

ldp_hello.c: ldp_hello_process()

If you look throug hthe code you will see where it is checking the
csn.  Add a printf or somethgin there and see what is happening.

(I'd do it myself, but I don;t have time, nor do I have an extra cisco
to play with right now)

Jim

> Here's part of the ldp output:
> 
> OUT: ## args    Hello msg does not have Csn TLV
> OUT: ## args Mesg size: 24 (34)
> EXIT: ## args ##
> ENTER: ## args ##
> ENTER: ## args ##
> ENTER: ## args ##
> OUT: ## args Hello Recv: entity(2)
> ENTER: ## args ##
> EXIT: ## args ##
> EXIT: ## args ##
> ENTER: ## args ##
> EXIT: ## args ##
> EXIT: ## args ##
> EXIT: ## args ##
> EXIT: ## args ##
> ENTER: ## args ##
> Incoming: want(10) size(0) current_size(0)
> UDP data size = 0
> EXIT: ## args ##
> OUT: ## args ldp_event: FAILURE executing a CLOSE
> ENTER: ## args ##
> EXIT: ## args ##
> EXIT: ## args ##                                      
> 
> Is that a bug or what ?
> 
> greetings
> 
> Thorsten
> 
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-- 
James R. Leu
jl...@mi...