From: Koen Zeilstra (koen@koenzeilstra.com)
Date: Thu Jun 08 2006 - 05:05:07 ART
Too bad nobody replied to this. I thinks this information is quite
valuable and omitted from univercd or CCO in general. The only reference I
could find was a tiny bit in Developing IP Multicast networks by Beau
Williamson.
In theory, ip multicast rate-limit without group or source list aggregates
all multicast traffic passin an interface. With group or source list it is
more granular specified to the specific group or source list.
After playing around with various options I found this:
interface Serial0/0
ip multicast rate-limit out group-list 10 600
ip multicast rate-limit out 1000
end
Router#sh ip mroute
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C -
Connected,
L - Local, P - Pruned, R - RP-bit set, F - Register flag,
T - SPT-bit set, J - Join SPT, M - MSDP created entry,
X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
U - URD, I - Received Source Specific Host Report,
Z - Multicast Tunnel, z - MDT-data group sender,
Y - Joined MDT-data group, y - Sending to MDT-data group
, Outgoing interface flags: H - Hardware switched, A - Assert winner
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode
(*, 224.2.2.2), 13:07:37/00:02:08, RP 0.0.0.0, flags: DCL
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Serial0/0, Forward/Dense, 13:07:37/00:00:00, limit 600 kbps
(*, 224.0.1.40), 13:08:32/00:02:06, RP 0.0.0.0, flags: DCL
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Serial0/0, Forward/Dense, 13:08:28/00:00:00, Int limit 1000 kbps
Ethernet0/0, Forward/Dense, 13:08:33/00:00:00
!
And with
interface Serial0/0
ip multicast rate-limit out 1000
end
Router#sh ip mroute
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C -
Connected,
L - Local, P - Pruned, R - RP-bit set, F - Register flag,
T - SPT-bit set, J - Join SPT, M - MSDP created entry,
X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
U - URD, I - Received Source Specific Host Report,
Z - Multicast Tunnel, z - MDT-data group sender,
Y - Joined MDT-data group, y - Sending to MDT-data group
Outgoing interface flags: H - Hardware switched, A - Assert winner
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode
(*, 224.2.2.2), 13:08:30/00:02:10, RP 0.0.0.0, flags: DCL
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Serial0/0, Forward/Dense, 13:08:30/00:00:00, Int limit 1000 kbps
(*, 224.0.1.40), 13:09:26/00:02:13, RP 0.0.0.0, flags: DCL
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Serial0/0, Forward/Dense, 13:09:22/00:00:00, Int limit 1000 kbps
Ethernet0/0, Forward/Dense, 13:09:27/00:00:00
It still seems that the two groups have 1000 kbps each, however I guess
the "Int" keywords reveals the secret. That is not present at the
grouplist rate-limit 600 before.
Very curious what the abbrevations Int means, though.
Any thoughts?
kind regards,
Koen Zeilstra
-----------------------
November, n.:
The eleventh twelfth of a weariness.
-- Ambrose Bierce, "The Devil's Dictionary"
On Tue, 30 May 2006, Koen Zeilstra wrote:
| I found that the "ip multicast rate-limit out 750" command, without
| group-lists, aggregates all multicast traffic and rate-limits it.
|
| With a group list a more granular rate-limiting is applied.
|
| Then two additional questions arise:
|
| 1. Is rate-limiting with a group-list applied per flow or per destination?
| 2. Would you need to exclude the 239.1.1.1 range from acl2 or is the order
| in which the ACL's are placed of more importance?
|
| regards,
|
| Koen
|
|
| -----------------------
| "What do you give a man who has everything?" the pretty
| teenager asked her mother.
| "Encouragement, dear," she replied.
|
| On Mon, 29 May 2006, Koen Zeilstra wrote:
|
| | Hi group,
| |
| | I want to limit multicast traffic destined to 239.1.1.1 to 500K and traffic to
| | all other groups to 750K
| |
| | Is there a difference between (question/answer related wise) the 2 options
| | below?
| |
| |
| | [option 1]
| | interface serial 0
| | ip multicast rate-limit out group-list 1 500
| | ip multicast rate-limit out group-list 2 750
| | !
| | access-list 1 permit 239.1.1.1 0.0.0.0
| | access-list 2 permit 0.0.0.0 255.255.255.255
| |
| |
| | [option 2]
| | interface serial 0
| | ip multicast rate-limit out group-list 1 500
| | ip multicast rate-limit out 750
| | !
| | access-list 1 permit 239.1.1.1 0.0.0.0
| |
| | regards,
| |
| | Koen
| |
| |
| | -----------------------
| | May Euell Gibbons eat your only copy of the manual!
| |
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