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Cisco 3600 unwanted ISDN Calls from multicasts

 
 
Hajo Jonker
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      12-15-2003
Hi There, I do have a Cisco Router 3620 with a 8 port ISDN Interface Running
IOS 12.2.20 IP (General Development)

ones in a While we do get unwanted ISDN active just after multicasts from
local Ethernet and ISDN Dialers

the LAN interface is 192.168.20.180/255.255.255.0
and the dialers 172.31.30.1/255.255.255.252
172.31.31.1/255.255.255.252

strange enough just after the logging entry (DEBUG IP PACKET) we do get a
%ISDN-6-LAYER2UP, we do have a Pont-to Multipont configuartion on the
central site an just a normal ISDN-2 on the Client site

we do use Callback and we did use DHCP relay but skipped this configuration
and we are running a local DHCP pool on the router now.

Config:
!
!version 12.1.18 IP GD 32MB Ram 8MB Flash
service config
no service single-slot-reload-enable
no service pad
service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
service password-encryption
!
hostname ??????
!
logging buffered 400000 debugging
aaa new-model
aaa authentication banner ^Welcome to Cisco 3620
^C
aaa authentication login default local
aaa authentication ppp default local
enable password ??????
!
username Thuis11 password ?????
username Thuis22 password ?????
!
username root password ?????
username thuis password ??????
!
!
!
!
memory-size iomem 15
clock timezone gmt 1
clock summer-time CET recurring 4 Sun Mar 2:00 4 Sun Oct 2:00
ip subnet-zero
no ip domain-lookup
!
isdn switch-type basic-net3
isdn tei-negotiation first-call
!
!
!
interface BRI0/0
description $$$ ISDN Verbinding naar Thuis11 tm Thuis22 $$$
no ip address
encapsulation ppp
no ip route-cache
no ip split-horizon
no ip mroute-cache
! Dialer pool-member NUMMER geeft aan voor welke Dialer NUMMERS de BRI
gebrukt mag worden
dialer pool-member 1
dialer pool-member 2
isdn switch-type basic-net3
isdn tei-negotiation first-call
no cdp enable
ppp authentication chap callin
no shutdown
!
interface BRI0/1
description $$$ ISDN Verbinding naar Thuis11 tm Thuis 22 $$$
no ip address
encapsulation ppp
no ip route-cache
no ip split-horizon
no ip mroute-cache
! Dialer pool-member NUMMER geeft aan voor welke Dialer NUMMERS de BRI
gebrukt mag worden
dialer pool-member 1
dialer pool-member 2
isdn switch-type basic-net3
isdn tei-negotiation first-call
no cdp enable
ppp authentication chap callin
no shutdown
!
interface BRI0/2
description $$$ ISDN Verbinding naar Thuis11 tm Thuis22 $$$
no ip address
encapsulation ppp
no ip route-cache
no ip split-horizon
no ip mroute-cache
! Dialer pool-member NUMMER geeft aan voor welke Dialer NUMMERS de BRI
gebrukt mag worden
dialer pool-member 1
dialer pool-member 2
isdn switch-type basic-net3
isdn tei-negotiation first-call
no cdp enable
ppp authentication chap callin
no shutdown
!
interface BRI0/3
description $$$ ISDN Verbinding naar $$$
no ip address
encapsulation ppp
no ip route-cache
no ip mroute-cache
isdn switch-type basic-net3
isdn tei-negotiation first-call
no cdp enable
ppp authentication chap callin
shutdown
!
interface BRI0/4
description $$$ ISDN Verbinding naar $$$
no ip address
encapsulation ppp
no ip route-cache
no ip mroute-cache
isdn switch-type basic-net3
isdn tei-negotiation first-call
no cdp enable
ppp authentication chap callin
shutdown
!
interface BRI0/5
description $$$ ISDN Verbinding naar $$$
no ip address
encapsulation ppp
no ip route-cache
no ip mroute-cache
isdn switch-type basic-net3
isdn tei-negotiation first-call
no cdp enable
ppp authentication chap callin
shutdown
!
interface BRI0/6
description $$$ ISDN Verbinding naar $$$
no ip address
encapsulation ppp
no ip route-cache
no ip mroute-cache
isdn switch-type basic-net3
isdn tei-negotiation first-call
no cdp enable
ppp authentication chap callin
shutdown
!
interface BRI0/7
description $$$ ISDN Verbinding naar $$$
no ip address
encapsulation ppp
no ip route-cache
no ip mroute-cache
isdn switch-type basic-net3
isdn tei-negotiation first-call
no cdp enable
ppp authentication chap callin
shutdown
!
interface Ethernet1/0
description connected to EthernetLAN
ip address 192.168.20.180 255.255.255.0
no ip mroute-cache
half-duplex
no cdp enable
no shutdown
!
interface Dialer1
description $$$ ISDN Verbinding naar Thuis11 $$$
! Tussen LAN met .1
ip address 172.31.30.1 255.255.255.252
encapsulation ppp
no ip split-horizon
dialer pool 1
! Remote Router Naam
dialer remote-name Thuis11
! Idle Time 121 sec
dialer idle-timeout 121
! ISDN nummer Thuiswerker
dialer string ???????
! ISDN Nummer waarop terggebeld wordt
dialer caller ????????? callback
!
dialer hold-queue 10
dialer-group 1
pulse-time 0
no cdp enable
ppp authentication chap
ppp chap hostname ??????
ppp chap password ?????
no shutdown
!
interface Dialer2
description $$$ ISDN Verbinding naar Thuis22 $$$
! Tussen LAN met .1
ip address 172.31.31.1 255.255.255.252
encapsulation ppp
no ip split-horizon
dialer pool 2
! Remote Router Naam
dialer remote-name Thuis22
! Idle Time 121 sec
dialer idle-timeout 121
! ISDN nummer Thuiswerker
!dialer string ????????
! ISDN Nummer waarop terggebeld wordt
!dialer caller ????????? callback
!
dialer hold-queue 10
dialer-group 1
pulse-time 0
no cdp enable
ppp authentication chap
ppp chap hostname ?????
ppp chap password ?????
no shutdown
!
!
ip classless
ip route 192.168.30.0 255.255.255.0 Dialer1
ip route 192.168.31.0 255.255.255.0 Dialer2
!
no ip http server
!
dialer-list 1 protocol ip permit
no cdp run
!
line con 0
exec-timeout 0 0
password ??????
line aux 0
line vty 0 4
password ??????
!
end

LOOKS OKE isn't

we do have a running callback but onwanted ISDN behavior on unwanted times


Log from the central ISDn 3620:
Dec 2 01:35:35.431 gmt: IP: s=192.168.20.180 (local), d=255.255.255.255
(Ethern
et1/0), len 50, sending broad/multicast
Dec 2 01:35:35.435 gmt: IP: s=172.31.30.1 (local), d=255.255.255.255
(Dialer1),
len 50, sending broad/multicast
Dec 2 01:35:35.435 gmt: IP: s=172.31.31.1 (local), d=255.255.255.255
(Dialer2),
len 50, sending broad/multicast
Dec 2 01:35:35.435 gmt: IP: s=172.31.31.1 (local), d=255.255.255.255
(Dialer2),
len 50, encapsulation failed
Dec 2 01:35:35.439 gmt: IP: s=172.31.32.1 (local), d=255.255.255.255
(Dialer3),
len 50, sending broad/multicast
Dec 2 01:35:35.439 gmt: IP: s=172.31.32.1 (local), d=255.255.255.255
(BRI0/1),
len 50, encapsulation failed
Dec 2 01:35:35.439 gmt: IP: s=172.31.33.1 (local), d=255.255.255.255
(Dialer4),
len 50, sending broad/multicast
Dec 2 01:35:35.443 gmt: IP: s=172.31.33.1 (local), d=255.255.255.255
(BRI0/1),
len 50, encapsulation failed
Dec 2 01:35:35.443 gmt: IP: s=172.31.34.1 (local), d=255.255.255.255
(Dialer5),
len 50, sending broad/multicast
Dec 2 01:35:35.443 gmt: IP: s=172.31.34.1 (local), d=255.255.255.255
(Dialer5),
len 50, encapsulation failed
Dec 2 01:35:35.447 gmt: IP: s=172.31.35.1 (local), d=255.255.255.255
(Dialer6),
len 50, sending broad/multicast
Dec 2 01:35:35.447 gmt: IP: s=172.31.35.1 (local), d=255.255.255.255
(Dialer6),
len 50, encapsulation failed
Dec 2 01:35:35.447 gmt: IP: s=172.31.36.1 (local), d=255.255.255.255
(Dialer7),
len 50, sending broad/multicast
Dec 2 01:35:35.447 gmt: IP: s=172.31.36.1 (local), d=255.255.255.255
(Dialer7),
len 50, encapsulation failed
Dec 2 01:35:35.447 gmt: IP: s=172.31.37.1 (local), d=255.255.255.255
(Dialer,
len 50, sending broad/multicast
Dec 2 01:35:35.451 gmt: IP: s=172.31.37.1 (local), d=255.255.255.255
(Dialer,
len 50, encapsulation failed
Dec 2 01:35:35.451 gmt: IP: s=172.31.38.1 (local), d=255.255.255.255
(Dialer9),
len 50, sending broad/multicast
Dec 2 01:35:35.451 gmt: IP: s=172.31.38.1 (local), d=255.255.255.255
(Dialer9),
len 50, encapsulation failed
Dec 2 01:35:35.451 gmt: IP: s=172.31.39.1 (local), d=255.255.255.255
(Dialer10)
, len 50, sending broad/multicast
Dec 2 01:35:35.451 gmt: IP: s=172.31.39.1 (local), d=255.255.255.255
(Dialer10)
, len 50, encapsulation failed
Dec 2 01:35:35.663 gmt: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/1, TEI
104
changed to up
Dec 2 01:35:38.239 gmt: %LINK-3-UPDOWN: Interface BRI0/1:2, changed state
to up
Dec 2 01:35:38.243 gmt: %DIALER-6-BIND: Interface BR0/1:2 bound to profile
Di4
Dec 2 01:35:39.159 gmt: %ISDN-6-CONNECT: Interface BRI0/2:1 is now
connected to
0162459804 Thuis1
Dec 2 01:35:39.339 gmt: %LINEPROTO-5-UPDOWN: Line protocol on Interface
BRI0/1:
2, changed state to up
Dec 2 01:35:40.455 gmt: IP: s=192.168.20.180 (local), d=255.255.255.255
(Ethern
et1/0), len 50, sending broad/multicast


 
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