Idle Timeout with Rotary Groups

[trevora]

I have a 3640 with a PRI running IOS 12.2.12a. The relevant config is below and it is WORKING.

What I want to know is if there is a cleaner way to specify the Idle timeout for ISDN users when using rotary groups?

I tried using: "ppp timeout idle 1800" on the Dialer interface but that did not work.

Eventually I had to use: "dialer in-band" and then it allowed me to enter "dialer idle-timeout 1800" but surely it is not correct to be specifying dialer in-band for ISDN connections?

interface Serial2/0:15

description ##### CONTROL CHANNEL FOR PRIMARY RATE ISDN #####

no ip address

encapsulation ppp

ip mroute-cache

dialer rotary-group 1

isdn switch-type primary-net5

isdn incoming-voice modem

isdn sending-complete

priority-group 1

no cdp enable

interface Dialer1

ip unnumbered Loopback0

encapsulation ppp

no ip mroute-cache

dialer in-band

dialer idle-timeout 1800

dialer load-threshold 25 either

peer default ip address pool RAS

priority-group 1

no cdp enable

ppp callback permit

ppp authentication ms-chap pap

ppp multilink

multilink max-links 2

multilink min-links 1

multilink load-threshold 2 either

[mark-obrien · Accepted solution]

Technically, you are not specifying in-band dialing for ISDN interfaces, but for the Dialer interface, which is a virtual interface that utilizes the physical ISDN B channels. IOS refers to the signaling from this virtual interface to the physical interface as inband signaling.

I hope this clarifies.

Mark

[tepatel · Accepted solution]

"ppp timeout idle xxx" command is designed to be used specifically on vtemplate/vaccess interfaces, this command is appropriate for virtual-profile configurations where a vaccess interface is always created for a user, and virtual private dial-up network (VPDN) home gateways where the projected interfaces is always terminated on a vaccess interface. And as the name suggest, ppp idle timer dosen't reply on interesting traffic. So with that any ppp packets will reset it.

While "dialer idle-timeout xxx" is a DDR command to be used under the interface tied with a physical interface. So isdn interface (tied with dialer interface) is a physical interface which is DDR enabled (dialer in-band) by default. So you need to use "dialer idle-timeout xx" to apply a concept of intereating traffic (which can be defined).