RE: rsvp-te admission control - i don't see it

[<aaron1 () gvtc com>]

Thanks, how do I see the control plane reservation?  I don’t seem to be seeing anything getting allocated 

 

RP/0/0/CPU0:r20#sh rsvp interface g0/0/0/1

Thu Sep  3 15:15:55.825 CST

 

*: RDM: Default I/F B/W % : 75% [default] (max resv/bc0), 0% [default] (bc1)

 

Interface                 MaxBW (bps)  MaxFlow (bps) Allocated (bps)      MaxSub (bps) 

------------------------- ------------ ------------- -------------------- -------------

GigabitEthernet0/0/0/1             1M             1M             0 (  0%)            0

 

RP/0/0/CPU0:r20#sh rsvp interface summary                       

Thu Sep  3 15:16:57.131 CST

 

Interface          MaxBW (bps) Allocated (bps) Path In Path Out Resv In Resv Out

------------------ ----------- --------------- ------- -------- ------- --------

Gi0/0/0/0                    0        0 (  0%)       1        0       0        1

Gi0/0/0/1                1000K        0 (  0%)       0        1       1        0

 

-Aaron

 

 

From: Łukasz Bromirski <lukasz () bromirski net> 
Sent: Thursday, September 3, 2020 2:45 PM
To: aaron1 () gvtc com
Cc: nanog () nanog org
Subject: Re: rsvp-te admission control - i don't see it

 

Aaron,





On 3 Sep 2020, at 20:05, aaron1 () gvtc com <mailto:aaron1 () gvtc com>  wrote:

 

I have a functional mpls-te test running, seems fine…but, question about bandwidth reservations please.

 

At the Headend router, I set bandwidth on my mpls-te tunnel, but I can’t for the life of me, find where in the network 
is this bandwidth actually being admitted, or seen, or allocated or anything!

 

I mean I look on rsvp interfaces, I look in wireshark at the tspec field of the path message, I look in the mpls te 
tunnels along the way, etc, etc, I can’t find where the network sees that bandwidth I’m asking for at the tunnel Head 
end.

 

I’m not sure if I understand you, but RSVP only does control plane reservation.

 

Then, once you have a tunnel to establish with specific bandwidth required, RSVP-TE will do CSPF based on link 
coloring, bandwidth available over interfaces and priority of tunnel to decide how to establish it. If the tunnel is 
setup over interface, bandwidth assigned to tunnel is taken out from bandwidth available on that interface. But this is 
purely control plane reservation. Nothing will be enforced in data plane.

 

To enforce those values, you need to apply QoS policies to interfaces over which you expert to serve MPLS TE tunnels.

 

— 

./