From: Chris Lewis \(chrlewis\) (chrlewis@cisco.com)
Date: Fri Sep 02 2005 - 16:50:56 GMT-3
I can't really say much, it is inconsistent in IOS releases, I did the
experiment below on 12.2(19a)
The only way I know to resolve whether it is needed or not for a
particular IOS is to try it without, then try it with :)
Chris
-----Original Message-----
From: simon hart [mailto:simon@harttel.com]
Sent: Friday, September 02, 2005 2:40 PM
To: Chris Lewis (chrlewis); Schulz, Dave; simon hart;
ccielab@groupstudy.com
Subject: RE: Second B-channel on ISDN
Chris,
I can never get both channels up unless I configure ppp multilink links
minimum 2 under the physical interface as well as the dialer. It may be
an IOS issue, am running 12.2(15)T9 on a 3620
Simon
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Chris Lewis (chrlewis)
Sent: 02 September 2005 20:26
To: Schulz, Dave; simon hart; ccielab@groupstudy.com
Subject: RE: Second B-channel on ISDN
I have just tried the following on a pair of routers and the two B
channels come up straight away, I suggest cutting down your config to
the minimum (I've configured what I think is just about the minimum) and
then add stuff back in to see where the problem is occurring.
R1----ISDN-----R2
R1 config
interface BRI0/0
no ip address
encapsulation ppp
dialer pool-member 1
isdn switch-type basic-ni
isdn spid1 0835866101 8358661
isdn spid2 0835866301 8358663
!
interface Dialer1
ip address 10.1.1.1 255.255.255.0
encapsulation ppp
dialer pool 1
dialer string 8358662
dialer-group 1
ppp multilink
multilink min-links 2
Notive there is no need for the ppp multilink command under the BRI in
this IOS release.
R2 config is exactly the same with the exception of the IP address (it
is 10.1.1.2), the spid values and the dialer string value
Show commands after I ping 10.1.1.2 from R1, as you can see, both B
channels are up.
R1#ping 10.1.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds:
04:29:55: %LINK-3-UPDOWN: Interface BRI0/0:1, changed state to up
04:29:55: %DIALER-6-BIND: Interface BR0/0:1 bound to profile Di1..!!!
Success rate is 60 percent (3/5), round-trip min/avg/max = 32/32/32 ms
R1#
04:29:58: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0/0:1,
changed sta e to up
04:29:59: %DIALER-6-BIND: Interface BR0/0:2 bound to profile Di1
04:29:257698037759: %LINK-3-UPDOWN: Interface BRI0/0:2, changed state to
up
04:30:01: %ISDN-6-CONNECT: Interface BRI0/0:1 is now connected to
8358662 R2
04:30:02: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0/0:2,
changed sta e to up
04:30:05: %ISDN-6-CONNECT: Interface BRI0/0:2 is now connected to
8358664 R2
R1#show int dialer 1
Dialer1 is up, line protocol is up
Hardware is Unknown
Internet address is 10.1.1.1/24
MTU 1500 bytes, BW 128 Kbit, DLY 20000 usec, reliability 255/255, txload
1/255, rxload 1/255 Encapsulation PPP, loopback not set DTR is pulsed
for 1 seconds on reset Time to interface disconnect: idle 00:00:30
Interface is bound to BR0/0:1 Interface is bound to BR0/0:2 LCP Open,
multilink Open
Open: IPCP, CDPCP
Last input 00:00:30, output never, output hang never Last clearing of
"show interface" counters 00:06:40 Input queue: 0/75/0/0
(size/max/drops/flushes); Total output drops: 0 Queueing strategy:
weighted fair Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/16 (active/max active/max total) Reserved
Conversations 0/0 (allocated/max allocated) Available Bandwidth 96
kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
7 packets input, 902 bytes
8 packets output, 638 bytes
BRI0/0:1 is up, line protocol is up <------------------------------
Hardware is PQUICC BRI with U interface
MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec, reliability 255/255, txload
1/255, rxload 1/255 Encapsulation PPP, loopback not set Keepalive set
(10 sec) Interface is bound to Di1 (Encapsulation PPP) LCP Open,
multilink Open Last input 00:00:07, output 00:00:07, output hang never
Last clearing of "show interface" counters never Input queue: 0/75/0/0
(size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
29 packets input, 1122 bytes, 0 no buffer Received 0 broadcasts, 0
runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun,
0 ignored, 0 abort
29 packets output, 861 bytes, 0 underruns 0 output errors, 0 collisions,
0 interface resets 0 output buffer failures, 0 output buffers swapped
out
1 carrier transitions
Bound to:
BRI0/0:2 is up, line protocol is up <-----------------------------
Hardware is PQUICC BRI with U interface
MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec, reliability 255/255, txload
1/255, rxload 1/255 Encapsulation PPP, loopback not set Keepalive set
(10 sec) Interface is bound to Di1 (Encapsulation PPP) LCP Open,
multilink Open Last input 00:00:02, output 00:00:02, output hang never
Last clearing of "show interface" counters never Input queue: 0/75/0/0
(size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
24 packets input, 532 bytes, 0 no buffer Received 0 broadcasts, 0 runts,
0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0
ignored, 0 abort
24 packets output, 532 bytes, 0 underruns 0 output errors, 0 collisions,
0 interface resets 0 output buffer failures, 0 output buffers swapped
out
2 carrier transitions
Chris
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Schulz, Dave
Sent: Friday, September 02, 2005 1:37 PM
To: simon hart; ccielab@groupstudy.com
Subject: RE: Second B-channel on ISDN
This is working on a PRI.....
Interface Serial 1/0:23
No ip address
Encapsulation ppp
Dialer pool-member 1
dialer idle-timeout 300
isdn switch-type primary-4ess
ppp authentication chap
ppp multilink
no clns route-cache
Dave Schulz,
Email: dschulz@dpsciences.com
-----Original Message-----
From: simon hart [mailto:simon@harttel.com]
Sent: Friday, September 02, 2005 12:56 PM
To: Schulz, Dave; ccielab@groupstudy.com
Subject: RE: Second B-channel on ISDN
Dave what is the configuration of the BRI that you attaching this dialer
too?
Make sure the physical interface has the same ppp configuration ie
encapsulation ppp
ppp multilink links minimum 2
Simon
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Schulz, Dave
Sent: 02 September 2005 17:31
To: ccielab@groupstudy.com
Subject: Second B-channel on ISDN
I am having an issue with getting the second B-channel to initiate
dialing in the following configuration. The first one dials, so I know
the authentication and the physical is correct. Any thoughts on what
may be missing?
interface Dialer15
bandwidth 128
ip address 10.11.15.1 255.255.255.252
encapsulation ppp
dialer pool 1
dialer remote-name Remote
dialer string 9104490020 class pri
dialer string 9104490021 class pri
dialer load-threshold 1 either
dialer-group 1
no cdp enable
ppp authentication chap
ppp multilink links minimum 2
no clns route-cache
Dave
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