02-06-2008 10:13 AM - edited 03-03-2019 08:35 PM
Cisco 1841 router connected up to a T1. Router is subnetted on the two interfaces with one of the interfaces going to a Cisco PIX and the other one goes directly to a Polycom teleconferencing device.
We want all 1.5mbit available EXCEPT when the Polycom is in use. When the Polycom is in use, we would like to have the router always give it 384/384. 99% of the time the Polycom is off.
Is there a series of commands to do this?
02-06-2008 11:46 AM
You need to implement QoS. Documentation can be found at http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cg/hqos_c/index.htm
HTH,
__
Edison.
02-06-2008 11:49 AM
So it's a little more than a few commands I take it?
02-06-2008 12:07 PM
Most definitely, it's more like a 'project'.
You need to classify the traffic you want to allocate bandwidth to - you need to mark this traffic and then apply a policy to it.
You have 2 option, bandwidth allocation or policing.
Reading the documentation I provided is the best bet.
02-06-2008 06:44 PM
Might be done easily (depending on interface type) to do outbound with CBWFQ; issues doing inbound. Inbound best done on far side's outbound. Special consideration when working with "cloud" WANs, e.g. frame-relay, ATM, MPLS; i.e. what happens within cloud.
For CBWFQ approach, first identify Polycom traffic, within a class-map. Can be done many different ways, one of which might be using ToS markings if Polycom marks its traffic.
Second define policy map reserving 384 (or same %).
Apply service policy to outbound interface.
e.g. perhaps something like this
class-map polycom
match ip dscp af41
policy-map yourname
class polycom
bandwidth 384000
serial #
service policy yourname output
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