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brian0shelby
Beginner

QoS on a 2800 with VOIP, VPN and BGP

I have a Cisco 2800 series ISR receiving 2 WAN links a 5Mbps fiber link and a 1.5Mbps T1. The Fiber is connected to the ISR on gigabit Ethernet 0/1, the T1 is on Serial 0 and our LAN side is connected on 0/0 to an HP Procurve Switch 3500-24. I am using BGP with both links, the 5Mbps fiber is setup as our primary and the T1 is the backup link.

I also have 3 remote sites that connect via a Sonicwall VPN 200 and have 3 VOIP phones, one at each site. Each site is on a cable or dsl connection 1.5Mbps or better.

I am having trouble with Quality of Service. During times of high upload and download, VOIP calls suffer, experiencing lag, choppiness and generally bad service. Sometimes during high load the VPN connections will lag and at worst drop connection. Ideally I’d like the VOIP calls and VPN connections to be the priority and impacted as little as possible during any times of high load.

I have some experience with CLI and setting up Cisco routers, I am in no way an expert and have little to no experience working with QoS. I’ve read through Cisco documentation for QoS but I am not sure what would be best. Below is our current configuration the only QoS change I’ve made or tried is turning on fair-queuing.

Any suggestions or solutions to make this work better would be appreciated.

Router#show running-config

Building configuration...

Current configuration : 2077 bytes

!

version 12.4

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption

!

hostname Router

!

boot-start-marker

boot-end-marker

!

no logging console

!

no aaa new-model

!

!

ip cef

!

!

multilink bundle-name authenticated

!

!

!

archive

log config

  hidekeys

!

!

!

!

!

interface GigabitEthernet0/0

description LAN

ip address 10.0.0.254 255.255.255.0

duplex auto

speed auto

!

interface GigabitEthernet0/1

description WANprimary

ip address 20.10.10.104 255.255.255.252

duplex auto

speed auto

fair-queue

!

interface Serial0/0/0

description WANbackup

ip address 30.20.20.106 255.255.255.252

encapsulation ppp

no fair-queue

!

router bgp 50

no synchronization

bgp log-neighbor-changes

bgp bestpath as-path ignore

network 10.0.0.0 mask 255.255.255.0

neighbor 30.20.20.10 remote-as 10

neighbor 30.20.20.10 description WANbackup BGP

neighbor 30.20.20.10 ebgp-multihop 10

neighbor 30.20.20.10 update-source Serial0/0/0

neighbor 30.20.20.10 weight 100

neighbor 30.20.20.10 prefix-list WANprimary BGP-out out

neighbor 30.20.20.10 route-map WANbackup BGP-in in

neighbor 30.20.20.10 route-map WANbackup BGP-out out

neighbor 20.10.10.255 remote-as 40

neighbor 20.10.10.255 description WANprimary BGP

neighbor 20.10.10.255 ebgp-multihop 10

neighbor 20.10.10.255 update-source GigabitEthernet0/1

neighbor 20.10.10.255 weight 200

neighbor 20.10.10.255 prefix-list WANprimary BGP-out out

no auto-summary

!

ip forward-protocol nd

ip route 10.0.0.0 255.255.255.0 Null0 255

ip route 30.20.20.10 255.255.255.255 30.20.20.105

ip route 20.10.10.255 255.255.255.255 20.10.10.103

ip route 20.11.10.255 255.255.255.255 20.10.10.103

!

!

no ip http server

!

!

ip prefix-list WANprimary BGP-out seq 5 permit 10.0.0.0/24

route-map WANbackup BGP-in permit 10

set local-preference 80

set as-path prepend 50 50

!

route-map WANbackup BGP-out permit 10

set as-path prepend 50 50

!

!

!

control-plane

!

!

line con 0

line aux 0

line vty 0 4

login

!

scheduler allocate 20000 1000

!

end

8 REPLIES 8
Edison Ortiz
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