04-21-2011
11:29 PM
- last edited on
03-25-2019
03:32 PM
by
ciscomoderator
Hello everyone!
We suffer some problems with our remote 2811, that has two WAN links (two different ISP) - we cannot get access to both of WAN at the same time.
At first, the aim was to load balance the traffic between wan links:
Generelly we have just the same scheme as https://supportforums.cisco.com/docs/DOC-8313 :
The problem itself:
What can cause such situation?
04-22-2011 12:29 AM
Try updating IOS.
04-22-2011 05:11 AM
CEF will load balance using a per-destination fashion therefore packets are forwarded towards the same path to a single destination, you can try changing it to per-packet but you should consider out of order packets.
I hope this is useful.
04-24-2011 10:51 PM
There is the voice trafiic travelling across the links, that's why per-packet cef balance may harm its quality.
Generally, what else can cause such kind of problem?
here is the part of the config:
interface Dialer1
description ADSL
mtu 1492
bandwidth 1000
ip address negotiated
ip nat outside
ip virtual-reassembly
encapsulation ppp
ip tcp adjust-mss 1452
dialer pool 1
dialer-group 1
no cdp enable
ppp authentication pap callin
ppp pap sent-username <***> password <***>
crypto map vpn-out
!
interface Dialer2
mtu 1460
bandwidth 500
ip address negotiated
ip pim dense-mode
ip nat outside
ip virtual-reassembly
encapsulation ppp
dialer in-band
dialer idle-timeout 0
dialer string 123
dialer vpdn
dialer-group 2
no peer neighbor-route
no cdp enable
ppp pfc local request
ppp pfc remote apply
ppp encrypt mppe auto
ppp authentication chap callin
ppp eap refuse
ppp chap hostname <***>
ppp chap password <***>
ppp ms-chap refuse
ppp ms-chap-v2 refuse
ppp pap refuse
crypto map vpn-out
!
ip route 0.0.0.0 0.0.0.0 Dialer1 track 10
ip route 0.0.0.0 0.0.0.0 Dialer2 track 20
ip route *pptp-server-ip* *pptp-server-mask* *local-pptp-gw*
!
*track 10 and track 20 make the dicisions according to interface line-protocol
and reachability of the gateways
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