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New Member

QoS using PPP Encap and Multilink

I have a 3640 connected to a 2620 via a synch serial T1. The 3640 has a NM-2FE-2W with a VWIC-2MFT-T1. The 2620 has a WIC-1DSU-T1 (Part #'s should be right). The following link describes what I'm trying to do: http://www.cisco.com/warp/public/788/voice-qos/voip-mlppp.html However, I can't even get the link to come up...some sort of PPP problem. Please give any suggestions on the following configs:

========================================

3640 ROUTER

------------

interface Multilink1

description Connected to TXDOT2620

bandwidth 1544

ip address 172.20.1.29 255.255.255.252

ip hello-interval eigrp 1 60

ip hold-time eigrp 1 180

ip authentication mode eigrp 1 md5

ip authentication key-chain eigrp 1 EIGRPKeyChain

no ip route-cache

no ip mroute-cache

fair-queue

no cdp enable

ppp multilink

ppp multilink fragment-delay 20

ppp multilink interleave

multilink-group 1

ip rtp priority 16384 16383 400

interface Serial2/0:0

description Linked to Interface Multilink 1

bandwidth 1544

no ip address

no ip redirects

encapsulation ppp

no ip route-cache

no fair-queue

no cdp enable

ppp multilink

multilink-group 1

========================================

2620 ROUTER

------------

interface Multilink1

description Connected to Cisco3640

bandwidth 1544

ip address 172.20.1.30 255.255.255.252

ip hello-interval eigrp 1 60

ip hold-time eigrp 1 180

ip authentication mode eigrp 1 md5

ip authentication key-chain eigrp 1 EIGRPKeyChain

no ip route-cache

no ip mroute-cache

no logging event link-status

fair-queue

no cdp enable

ppp multilink

ppp multilink fragment-delay 20

ppp multilink interleave

multilink-group 1

ip rtp priority 16384 16383 400

interface Serial0/0

description Linked to Interface Multilink 1

bandwidth 1544

no ip address

no ip redirects

encapsulation ppp

no ip route-cache

no ip mroute-cache

no fair-queue

no cdp enable

ppp multilink

multilink-group 1

  • Other Network Infrastructure Subjects
1 REPLY
New Member

Re: QoS using PPP Encap and Multilink

Hi,

try debugging PPP authentication. I have seen in some cases where the ppp connection is trying to negotiate some authentication parameters (CHAP). So try to enable CHAP authentication (locally on the routers) it might solve your problems.

Hope this helps.

Ciao

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