Virtual-Access2 Interface Flapping

[dleboeuf]

Hello,

I have noticed recently that one of my customers has been having an issue with their Virtual-Access interface constantly going up/down throughout the day, every day. Whenever it goes down, it also gets unbound from the Dialer profile. I am not familiar at all with this issue so I am not sure where I should even start looking to troubleshoot. I haven't heard the customer complain at all or anything, I just noticed it when doing health checks. Below is a snippet of the logs, and the configuration on the Dialer and Virtual-Access2 interface. Let me know if you want me to attach any other output(s).]

Thanks!

Sep 1 01:27:47 CST: %LINK-3-UPDOWN: Interface Virtual-Access2, changed state to up
Sep 1 01:28:09 CST: %DIALER-6-UNBIND: Interface Vi2 unbound from profile Di1
Sep 1 01:28:09 CST: %LINK-3-UPDOWN: Interface Virtual-Access2, changed state to down
Sep 1 01:29:02 CST: %DIALER-6-BIND: Interface Vi2 bound to profile Di1
Sep 1 01:29:02 CST: %LINK-3-UPDOWN: Interface Virtual-Access2, changed state to up
Sep 1 01:29:21 CST: %DIALER-6-UNBIND: Interface Vi2 unbound from profile Di1
Sep 1 01:29:21 CST: %LINK-3-UPDOWN: Interface Virtual-Access2, changed state to down
Sep 1 01:34:08 CST: %DIALER-6-BIND: Interface Vi2 bound to profile Di1
Sep 1 01:34:08 CST: %LINK-3-UPDOWN: Interface Virtual-Access2, changed state to up
Sep 1 01:34:14 CST: %DIALER-6-UNBIND: Interface Vi2 unbound from profile Di1
Sep 1 01:34:14 CST: %LINK-3-UPDOWN: Interface Virtual-Access2, changed state to down
Sep 1 01:42:17 CST: %DIALER-6-BIND: Interface Vi2 bound to profile Di1
Sep 1 01:42:17 CST: %LINK-3-UPDOWN: Interface Virtual-Access2, changed state to up
Sep 1 01:42:52 CST: %DIALER-6-UNBIND: Interface Vi2 unbound from profile Di1
Sep 1 01:42:52 CST: %LINK-3-UPDOWN: Interface Virtual-Access2, changed state to down
Sep 1 01:43:14 CST: %DIALER-6-BIND: Interface Vi2 bound to profile Di1
Sep 1 01:43:14 CST: %LINK-3-UPDOWN: Interface Virtual-Access2, changed state to up
Sep 1 01:43:48 CST: %DIALER-6-UNBIND: Interface Vi2 unbound from profile Di1
Sep 1 01:43:48 CST: %LINK-3-UPDOWN: Interface Virtual-Access2, changed state to down
Sep 1 01:44:55 CST: %DIALER-6-BIND: Interface Vi2 bound to profile Di1
Sep 1 01:44:55 CST: %LINK-3-UPDOWN: Interface Virtual-Access2, changed state to up

!
interface Dialer1
mtu 1492
ip address negotiated
ip nat outside
encapsulation ppp
dialer pool 1
dialer-group 1
no cdp enable
ppp authentication chap callin
ppp chap hostname ABC123
ppp chap password 7 ABC123
ppp pap sent-username ABC123 password 7 ABC123
ip virtual-reassembly
!
!
interface Virtual-Access2
pulse-time 0
end
!

[balaji.bandi]

May be worth contact ISP for this issue, check ISP have any intermittent issue with circuit to check

[MHM Cisco World]

"" I haven't heard the customer complain at all or anything""
this not indicate, may be the customer use dialer as backup so he not complain
run debug to check why always this user UP/DOWN it may be password enter wrong since you use PAP.

[paul driver]

Hello
Check your cabling to the xDSL modem

Post the outout of the following:
sh ip int brief
sh interfaces
debug ppp negotiation