ISDN Behavior

From: Ahmed Mustafa (ahmed.mustafa@sbcglobal.net)
Date: Mon Apr 12 2004 - 18:06:39 GMT-3


Is it normal ISDN behavior. If I ping the r4 interface itself it causes
dialer to go up eventhough the interface dialer 0 is already up. If I try to
ping the opposite address then it makes more sence to me that the Dialer
should dial the other side.

After redistribution, all other routers are seeing the ISDN route
164.1.45.0/29. If I ping for example the R4 address 164.1.45.4 or r5 address
164.1.45.5 from r1 which is two hop away from both r4 and r5. I noticed that
I could ping both the interfaces throught their respective gateways without
bringing the dialer up.

                    R5------------------------------------------

                 ISDN
R3-------------------------------------------R1

                   R4-------------------------------------------

R3 is connected to R4 and R5 via seperate Frame-Relay point to point
interfaces. R1 is connected to R3 via HDLC. so If I ping R4 isdn address, it
goes from

R1-R3-R4

and R5 ISDN address goes through

R1-R3-R5

Is it a normal behavior?

Below is the configs

interface BRI0
 no ip address
 encapsulation hdlc
 dialer pool-member 1
 isdn switch-type basic-ni
 isdn spid1 11110101 1111
!
interface Dialer0
 ip address 164.1.45.4 255.255.255.248
 ip router isis
 dialer pool 1
 dialer idle-timeout 0
 dialer string 2222
 dialer string 4082222
 dialer-group 1
 no cdp enable
 isis metric 30

C 204.12.1.0/24 is directly connected, Serial1
     164.1.0.0/16 is variably subnetted, 12 subnets, 2 masks
i L2 164.1.35.0/24 [115/20] via 164.1.34.3, Tunnel0
C 164.1.34.0/24 is directly connected, Serial0
C 164.1.45.0/29 is directly connected, Dialer0
C 164.1.47.0/24 is directly connected, Ethernet0
i L2 164.1.55.0/24 [115/20] via 164.1.34.3, Tunnel0
i L2 164.1.5.0/24 [115/20] via 164.1.34.3, Tunnel0
O 164.1.7.0/24 [110/11] via 164.1.47.7, 00:14:49, Ethernet0
i L2 164.1.13.0/24 [115/10] via 164.1.34.3, Tunnel0
i L2 164.1.12.0/24 [115/10] via 164.1.34.3, Tunnel0
i L2 164.1.23.0/24 [115/10] via 164.1.34.3, Tunnel0
i L2 164.1.18.0/24 [115/10] via 164.1.34.3, Tunnel0
i L2 164.1.26.0/24 [115/10] via 164.1.34.3, Tunnel0
     150.1.0.0/16 is variably subnetted, 8 subnets, 2 masks
i L2 150.1.6.0/24 [115/10] via 164.1.34.3, Tunnel0
i L2 150.1.5.0/24 [115/20] via 164.1.34.3, Tunnel0
C 150.1.4.0/24 is directly connected, Loopback0
i L2 150.1.3.0/24 [115/10] via 164.1.34.3, Tunnel0
i L2 150.1.2.0/24 [115/10] via 164.1.34.3, Tunnel0
i L2 150.1.1.0/24 [115/10] via 164.1.34.3, Tunnel0
O 150.1.7.7/32 [110/11] via 164.1.47.7, 00:14:50, Ethernet0
i L2 150.1.8.0/24 [115/10] via 164.1.34.3, Tunnel0
Rack1R4#

-----------------------------------------------------------------------------
--------------------------

interface BRI0
 ip address 164.1.45.5 255.255.255.248
 ip router isis
 encapsulation hdlc
 dialer map ip 164.1.45.4 name Rack1R4 broadcast 1111
 dialer map ip 150.1.4.0 name Rack1R4 1111
 dialer map clns 28.0001.0001.0004.00 name Rack1R4 broadcast 1111
 dialer watch-group 1
 dialer-group 1
 isdn switch-type basic-ni
 isdn spid1 22220101 2222
 isis metric 30

Gateway of last resort is not set

     164.1.0.0/16 is variably subnetted, 12 subnets, 2 masks
C 164.1.35.0/24 is directly connected, Serial0
i L2 164.1.34.0/24 [115/20] via 164.1.35.3, Tunnel0
C 164.1.45.0/29 is directly connected, BRI0
i L2 164.1.47.0/24 [115/20] via 164.1.35.3, Tunnel0
C 164.1.55.0/24 is directly connected, Loopback55
C 164.1.5.0/24 is directly connected, Ethernet0
i L2 164.1.7.0/24 [115/20] via 164.1.35.3, Tunnel0
i L2 164.1.13.0/24 [115/10] via 164.1.35.3, Tunnel0
i L2 164.1.12.0/24 [115/10] via 164.1.35.3, Tunnel0
i L2 164.1.23.0/24 [115/10] via 164.1.35.3, Tunnel0
i L2 164.1.18.0/24 [115/10] via 164.1.35.3, Tunnel0
i L2 164.1.26.0/24 [115/10] via 164.1.35.3, Tunnel0
     150.1.0.0/16 is variably subnetted, 8 subnets, 2 masks
i L2 150.1.6.0/24 [115/10] via 164.1.35.3, Tunnel0
C 150.1.5.0/24 is directly connected, Loopback0
i L2 150.1.4.0/24 [115/20] via 164.1.35.3, Tunnel0
i L2 150.1.3.0/24 [115/10] via 164.1.35.3, Tunnel0
i L2 150.1.2.0/24 [115/10] via 164.1.35.3, Tunnel0
i L2 150.1.1.0/24 [115/10] via 164.1.35.3, Tunnel0
i L2 150.1.7.7/32 [115/20] via 164.1.35.3, Tunnel0
i L2 150.1.8.0/24 [115/10] via 164.1.35.3, Tunnel0
Rack1R5#



This archive was generated by hypermail 2.1.4 : Mon May 03 2004 - 19:48:46 GMT-3