rsvp-te admission control - i don't see it
aaron1 at gvtc.com
aaron1 at gvtc.com
Fri Sep 4 16:06:17 UTC 2020
Thanks Mark, I have a tunnel traversing those interfaces. Customer routers (r10, r30) can ping end to end via tunnel.
Not sure if I’m missing something here. I wonder if I’m not signaling for the rsvp bandwidth correctly. I just don’t see any allocated bandwidth in the rsvp interfaces anywhere.
Here’s one of the transit routers… r24…. Should I see “allocated (bps)” here ?
RP/0/0/CPU0:r24#sh rsvp int
Fri Sep 4 10:54:16.451 CST
*: RDM: Default I/F B/W % : 75% [default] (max resv/bc0), 0% [default] (bc1)
Interface MaxBW (bps) MaxFlow (bps) Allocated (bps) MaxSub (bps)
------------------------- ------------ ------------- -------------------- -------------
GigabitEthernet0/0/0/0 750M* 750M 0 ( 0%) 0*
GigabitEthernet0/0/0/1 750M* 750M 0 ( 0%) 0*
Details….
LSP/TE-tunnel has dynamic path option, but I disallow it to flow via r21… so tunnel takes the southbound path via r20-24-r25-r23-r22
(2) unidirectional te-tunnels
r20 is headend and r22 is tailend r20---->r22
r22 is headed and r20 is tailend r22---->r20
R10 R30
| |
| |
r20-----r21-----r22
| |
| |
| |
r24-----r25-----r23
r20’s tunnel…
RP/0/0/CPU0:r20#sh mpls traffic-eng tun br
Fri Sep 4 10:59:51.509 CST
TUNNEL NAME DESTINATION STATUS STATE
tunnel-te1 10.20.0.22 up up
r22--->r20 10.20.0.20 up up
Displayed 1 (of 1) heads, 0 (of 0) midpoints, 1 (of 1) tails
Displayed 1 up, 0 down, 0 recovering, 0 recovered heads
RP/0/0/CPU0:r20#sh mpls traffic-eng tun name tunnel-te1 | be count
Fri Sep 4 10:59:54.309 CST
Node hop count: 4
Hop0: 10.20.1.21
Hop1: 10.20.1.18
Hop2: 10.20.1.17
Hop3: 10.20.1.14
Hop4: 10.20.1.13
Hop5: 10.20.1.10
Hop6: 10.20.1.9
Hop7: 10.20.0.22
Displayed 1 (of 1) heads, 0 (of 0) midpoints, 0 (of 1) tails
Displayed 1 up, 0 down, 0 recovering, 0 recovered heads
r22’s tunnel….
RP/0/0/CPU0:r22#sh mpl tr tun br
Fri Sep 4 10:25:32.668 CST
TUNNEL NAME DESTINATION STATUS STATE
tunnel-te1 10.20.0.20 up up
r20--->r22 10.20.0.22 up up
Displayed 1 (of 1) heads, 0 (of 0) midpoints, 1 (of 1) tails
Displayed 1 up, 0 down, 0 recovering, 0 recovered heads
RP/0/0/CPU0:r22#sh mpl tr tun name tunnel-te1 | be count
Fri Sep 4 10:25:35.858 CST
Node hop count: 4
Hop0: 10.20.1.10
Hop1: 10.20.1.13
Hop2: 10.20.1.14
Hop3: 10.20.1.17
Hop4: 10.20.1.18
Hop5: 10.20.1.21
Hop6: 10.20.1.22
Hop7: 10.20.0.20
Displayed 1 (of 1) heads, 0 (of 0) midpoints, 0 (of 1) tails
Displayed 1 up, 0 down, 0 recovering, 0 recovered heads
X = router number
10.20.0.0/16
10.20.0.X/24 - loopbacks
10.20.1.0/24 – /30’s between routers
(numbered clockwise, lowest to highest, start at r20)
(r20 is .1 , r21 is .2 , r21 is .5 , etc)
10.20.1.0/30 – r20---r21
10.20.1.4/30 – r21---r22
10.20.1.8/30 – r22---r23
10.20.1.12/30 – r23---r25
10.20.1.16/30 – r25---r24
10.20.1.20/30 – r24---r20
r10#sh ip int br | in up
GigabitEthernet3 1.0.0.2 YES manual up up
RP/0/0/CPU0:r30#sh ip int br | in Up
GigabitEthernet0/0/0/2 1.1.1.2 Up Up default
r10#trace 1.1.1.2
Type escape sequence to abort.
Tracing the route to 1.1.1.2
VRF info: (vrf in name/id, vrf out name/id)
1 1.0.0.1 23 msec 5 msec 7 msec
2 10.20.1.21 [MPLS: Labels 24000/24010 Exp 0] 43 msec 50 msec 40 msec
3 10.20.1.17 [MPLS: Labels 19/24010 Exp 0] 49 msec 42 msec 41 msec
4 10.20.1.13 [MPLS: Labels 24001/24010 Exp 0] 42 msec 46 msec 46 msec
5 10.20.1.9 42 msec 38 msec 34 msec
6 1.1.1.2 55 msec * 44 msec
RP/0/0/CPU0:r30#traceroute 1.0.0.2
Fri Sep 4 15:25:10.129 UTC
Type escape sequence to abort.
Tracing the route to 1.0.0.2
1 1.1.1.1 29 msec 0 msec 0 msec
2 10.20.1.10 [MPLS: Labels 24000/24009 Exp 0] 49 msec 49 msec 49 msec
3 10.20.1.14 [MPLS: Labels 20/24009 Exp 0] 39 msec 49 msec 39 msec
4 10.20.1.18 [MPLS: Labels 24001/24009 Exp 0] 49 msec 39 msec 49 msec
5 10.20.1.22 49 msec 49 msec 39 msec
6 1.0.0.2 69 msec * 49 msec
RP/0/0/CPU0:r30#
From: NANOG <nanog-bounces+aaron1=gvtc.com at nanog.org> On Behalf Of Mark Tinka
Sent: Thursday, September 3, 2020 10:58 PM
To: nanog at nanog.org
Subject: Re: rsvp-te admission control - i don't see it
On 3/Sep/20 22:20, aaron1 at gvtc.com <mailto:aaron1 at gvtc.com> wrote:
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
You will only see allocations once you have TE tunnels (sessions) actually setup.
Without tunnels setup, but RSVP-TE enabled on the interfaces, all you will see the maximum bandwidth that RSVP-TE can allocate across said interfaces.
Remember that RSVP-TE is purely control plane. So it doesn't matter if you signal an LSP with 10Mbps or 10Gbps. It will not determine whether a link (or LSP) will actually pass 10Mbps or 10Gbps worth of traffic. It's just a reference.
Back when I used to RSVP-TE, I'd signal 10Gbps links as 10Mbps. That gave me plenty of granularity to scale up without having an unwieldy configuration.
Mark.
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