PPPoE Redial on Cisco 877

[paulhughes5]

Hello

I have a Cisco 877 doing PPPoE through a ISP supplied modem that is in bridge mode (long story).  When the DSL drops on the modem it takes around 5 to 10 mins for the 877 to redial the connection.  Is there anything that can be done to adjust this?

Here is the config I'm running:

interface Vlan1
 description PPPoE-Interface(WAN)
 ip address dhcp
 load-interval 30
 pppoe enable group global
 pppoe-client dial-pool-number 1
end
interface Dialer1
 mtu 1492
 bandwidth 750
 ip address negotiated
 ip access-group acl-outside-in in
 no ip redirects
 no ip unreachables
 no ip proxy-arp
 ip flow ingress
 ip nat outside
 ip virtual-reassembly
 encapsulation ppp
 load-interval 30
 dialer pool 1
 dialer idle-timeout 0
 dialer enable-timeout 5
 dialer persistent
 dialer redial interval 30 attempts 12
 dialer-group 1
 ipv6 address autoconfig default
 ipv6 enable
 ipv6 traffic-filter acl-outside6-in in
 ipv6 dhcp client pd LAN
 keepalive 10 2
 ppp authentication chap pap callin
 ppp chap hostname xxxx 
 ppp chap password 7 xxxx
 service-policy output Upload
end

Its possible some of that config is redundant but I've tried as much as I can see online.

Thanks

[johnlloyd_13]

Hi Paul,

I don't think it's a config issue. Could you post your show dsl int atm0? Look for Noise Margin and Attenuation and see whether they're within specs.

Also, check for CRCs using show int atm0 | i error.

Sent from Cisco Technical Support iPhone App

[paulhughes5]

Hi.

I'm not using the atm interface on the 877.  There is a dsl modem attached via fa3 which is running vlan 1 (config above).  When the PPP on the modem drops it reconnected straight away and the Cisco sits there waiting for a period of time.  Its that wait I am trying to get around.

[johnlloyd_13]

Hi Paul,

Sorry about that. Have you tried playing around speed/duplex settings on the FE3 port? Give it a try.

Sent from Cisco Technical Support iPhone App

[mavespig]

Hi Paul,

It is not a good idea to mix together dialer timer commands. They are all trying to bring up the call, and they may interfere each other.

I'd suggest to start by removing all additional dialer commands, having only persistent.

Dialer persistent will keep the call up even if there is no interesting traffic.

 dialer pool 1
 dialer persistent
 dialer-group 1

After the configuration change, start a continuous ping to an external IP from the Cisco router (e.g. google), bounce the DSL link on the external modem and check how long it takes to have the link up.

You can verify how the dialer works by enabling:

- deb dialer

- deb ppp nego

- deb pppoe event

- deb pppoe error

Hope this helps

Marco

[paulhughes5]

Sorry for the delay.

I've removed the extra command but it still seems to take 10 mins for it to re-connect.  No amount of shutting and no shutting the dialer interface seems to make it come up any sooner either.  I guess it could be an issue with the ISP modem I have.

[mavespig]

Do you see any PPP activity in the debugs, when the router is trying to reconnect?