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 <luk...@bromirski.net>
Sent: Thursday, September 3, 2020 2:45 PM
To: aar...@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, aar...@gvtc.com <mailto:aar...@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.
—
./
