04-17-2018 10:52 PM - edited 03-05-2019 10:17 AM
Hi
Can some one please advise.
I have a router running ISDN BRI connection, dial on demand (model 2811)
ISDN BRI has 2 channels, I am wanting to execute the command dialer load-threshold xxx either to use the second B channel if the first B channel reaches its full capacity. The confusion is with the rotary group? Can I not use this command without the rotary-group? does the physical interface need to be configured as part of rotary group or the dialer interface? What is the use of rotary group when already on ISDN I have 2 B channels.
BRI config:
interface BRI0/0/0
bandwidth 64
no ip address
encapsulation ppp
no ip mroute-cache
dialer pool-member 1
isdn switch-type basic-net3
isdn point-to-point-setup
ppp authentication chap
end
dialer interface config:
interface Dialer1
bandwidth 64
ip address x.x.x.x
ip nat inside
ip virtual-reassembly
encapsulation ppp
no ip mroute-cache
ip ospf cost 30000
dialer pool 1
dialer remote-name abcdef
dialer idle-timeout 300
dialer string xxxxx
dialer watch-group 30
dialer-group 2
no cdp enable
ppp authentication chap
end
Regards,
Solved! Go to Solution.
04-18-2018 12:34 AM
Hello,
as far as I recall, rotary groups are used for multiple physical BRI interfaces. In your case, with only one physical BRI, all you need is the two commands below:
ppp multilink
dialer load-threshold load [outbound | inbound | either]
04-18-2018 12:34 AM
Hello,
as far as I recall, rotary groups are used for multiple physical BRI interfaces. In your case, with only one physical BRI, all you need is the two commands below:
ppp multilink
dialer load-threshold load [outbound | inbound | either]
04-18-2018 05:51 PM
Thank you Georg for answering.
Can I ask how do I verify if B1 B2 are in use.
Regards
04-18-2018 11:08 PM
Thanks I tested it with min threshold 1 and could see in debug both bri x/x/x:1 and : 2 were were connected
04-18-2018 11:18 PM
Hello,
the exec command 'show isdn status' tells you the status of the layers. In he 'Later 3 Status' section check for the line 'Number of available B-channels =', which gives you the number of B channels that are not being used. Keep in mind that this line might not appear until a call is connected.
04-18-2018 11:36 PM
I put the threshold minimum and pinged the dialer . At the same time did the debugs too.
I did the sh isdn active which showed me two calls out instead of one
04-18-2018 11:47 PM
Hello,
setting the dialer load-threshold to 1 immediately brings up both B channels. If you want to bring up the second only when the first one is fully utilized, use a value of 250 or higher...
04-18-2018 11:48 PM
I am using 255, that was done to test only
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