PRI to BRI multilink failure.

Jul 14, 2005 2 Replies

Far end is a 3Com ISDN U lanmodem. It is configured for dialin and multilink.



Near end is a C2610 with a 2ct1 network module.



config:



Current configuration : 1725 bytes ! version 12.1 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname filet-rtr ! enable secret 5 ************************ enable password ************* ! ! ! ! ! ip subnet-zero no ip finger ! isdn switch-type primary-ni ! ! controller T1 1/0 framing esf linecode b8zs pri-group timeslots 1-10,24 ! controller T1 1/1 ! ! interface Ethernet0/0 ip address 192.9.200.249 255.255.255.0 no ip mroute-cache no cdp enable ! interface Serial1/0:23 no ip address encapsulation ppp no ip route-cache dialer pool-member 1 isdn switch-type primary-ni isdn calling-number 7807023021 no cdp enable ppp multilink multilink max-links 2 ! interface Dialer1 ip unnumbered Ethernet0/0 encapsulation ppp shutdown dialer pool 1 dialer remote-name agent1289 dialer rotor best dialer idle-timeout 20 dialer string 7804089168 dialer string 7804089169 dialer hold-queue 10 dialer load-threshold 3 outbound dialer-group 1 no fair-queue no cdp enable ppp authentication pap callin ppp chap refuse ppp pap sent-username iq-rtr password 7 ******************** ppp multilink bap ppp bap call accept ppp bap callback accept ppp bap timeout pending 20 ppp bap max dialers 2 multilink max-links 2 ! ip classless ip route 10.10.5.0 255.255.255.0 10.10.5.1 ip route 10.10.5.1 255.255.255.255 Dialer1 no ip http server ! access-list 101 permit ip 192.9.200.0 0.0.0.255 10.10.5.0 0.0.0.255 dialer-list 1 protocol ip list 101 no cdp run ! line con 0 transport input none line aux 0 line vty 0 4 password ********** login ! end



Debugs are:



filet-rtr#sh deb Dial on demand: Dial on demand events debugging is on PPP: Multilink events debugging is on BAP: BAP general debugging is on BAP negotiation debugging is on BAP error debugging is on ISDN: ISDN Q931 packets debugging is on ISDN Q931 packets debug DSLs. (On/Off/No DSL:1/0/-) DSL 0 --> 31 1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


Call come up fine, on one B channel:


2d00h: Di1 DDR: Call connected, 1 packets unqueued, 1 transmitted, 0 discarded
2d00h: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0:9, changed state to up
2d00h: Di1 BAP: Group "0030.1e3f.0ad7" (10) (multilink) with precedence created
2d00h: 0030.1e3f.0ad7 MLP: Established BAP group 10 on Di1, physical Se1/0:9


When I try to add a channel to the bundle, however:


2d00h: Di1 BAP: Received CallbackReq, id 24, len 13
2d00h: 0030.1e3f.0ad7 BAP: I CallbackReq [Idle] id 24 len 17
2d00h: 0030.1e3f.0ad7 BAP: LinkType 64 kbps type isdn (0x0105004001)
2d00h: 0030.1e3f.0ad7 BAP: PhoneDelta
2d00h: 0030.1e3f.0ad7 BAP: UniqueDigits 1 (0x010301)
2d00h: 0030.1e3f.0ad7 BAP: SubscriberNumber 9 (0x020339)
2d00h: 0030.1e3f.0ad7 BAP: I CallbackReq, id 24
2d00h: Se1/0:23 DDR: has 10 ongoing call(s), maximum allowed call(s) 10 on pool 1, exceeded max
2d00h: DDR: rotor dialout [best] least recent failure is also most recent failure
2d00h: DDR: rotor dialout [best] also has most recent failure
2d00h: BAP: bap_link_is_free passed NULL idb
2d00h: DDR: rotor dialout [best]
2d00h: 0030.1e3f.0ad7 BAP: O NAK for CallbackReq, id 24
2d00h: 0030.1e3f.0ad7 BAP: Sending CallbackRsp, id 24, len 55 on Di1 to remote
2d00h: 0030.1e3f.0ad7 BAP: O CallbackRsp [Idle] id 24 len 51 NAK
2d00h: 0030.1e3f.0ad7 BAP: LinkType 64 kbps type isdn (0x0105004001)
2d00h: 0030.1e3f.0ad7 BAP: Reason No links of specified type(s) available
2d00h: 0030.1e3f.0ad7 BAP: (0x04294E6F206C696E6B73206F66207370)
2d00h: 0030.1e3f.0ad7 BAP: (0x65636966696564207479706528732920)
2d00h: 0030.1e3f.0ad7 BAP: (0x617661696C61626C65)

Which would seem to indicate I am out of B channels on my PRI. But... show isdn service gives me:



filet-rtr#sh is se PRI Channel Statistics: ISDN Se1/0:23, Channel [1-24] Configured Isdn Interface (dsl) 0 Channel State (0=Idle 1=Proposed 2=Busy 3=Reserved 4=Restart



5=Maint_Pend) Channel : 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 State : 0 0 0 0 0 0 0 0 0 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 Service State (0=Inservice 1=Maint 2=Outofservice) Channel : 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 State : 0 0 0 0 0 0 0 0 0 0 2 2 2 2 2 2 2 2 2 2 2 2 2 2

I'm stumped. Can anyone out there help?



Jeff



Thanks.. I tried it though, and no joy. All channels are configured for inbound and outbound.

Thanks,

Jeff

Maybe the last channels are configured by the carrier for receiving calls only, try to revert the order the router picks a b channel issueing the following command at the serial interface: isdn bchan-number-order ascending Bye, Tosh.

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