[c-nsp] QoS Policy for BGP/OSPF

[Mikael Abrahamsson]

On Tue, 2 May 2006, Don Lundquist wrote:

> Hello,
>
> Does anyone have a few config examples for QoS prioritizing of BGP/OSPF
> traffic between routers?

Cisco routers do this by default.

> I am not looking for anything in particular, just some basic examples in
> prioritizing those routing protocols communications between devices.

http://www.cisco.com/en/US/tech/tk543/tk544/technologies_tech_note09186a0080094612.shtml

Short from the above page:

"Understanding How Routing Updates and Layer 2 Control Packets Are Queued 
on an Interface with a QoS Service Policy - Cisco IOS assigns an IP 
precedence of 6 to routing protocol packets on the control plane. As noted 
by RFC 791,"The Internetwork Control designation is intended for use by 
gateway control originators only." Specifically, Cisco IOS marks the 
following IP-based control packets: Open Shortest Path First (OSPF), 
Routing Information Protocol (RIP), Enhanced Interior Gateway Routing 
Protocol (EIGRP) hellos, and keepalives. Telnet packets to and from the 
router also receive an IP precedence value of 6. The assigned value 
remains with the packets when the output interface transmits them into the 
network."

Does this help you?

-- 
Mikael Abrahamsson    email: swmike at swm.pp.se