01-09-2004 10:02 PM - edited 03-02-2019 12:48 PM
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Dear friends,
The network is like this,the customer is connected through 256k serial lease line from our network and he is taken the isdn connection from different network.now the customer wants when our link (i.e serial ) goes down then it is autometically fallback to isdn.and that time our network is not come in the picture.that network has given him the pool of IP i.e 10.202.224.160/28 ,username is xxxxx and password is xxxx and the dialer string is xxxx.and that network end RAS IP is 10.202.221.13.here is my bri interface configuratio done in customer end router
interface bri0/0
ip address 10.202.224.161 255.255.255.240
dialer-group 1
encapsulation ppp
no keepalive
ppp multilink
ppp authentication pap
no ip route-cache
dialer string xxxx
no ndsp enable
isdn switch-type basic-net3
no mpls route-cache
exit
ip route 0.0.0.0 0.0.0.0 10.202.221.13 100
this is the only configuration i did in the router for isdn and im not able to dial i have confusion in routing.Pls help me regarding configuration as early as possible.
thanks with regards
santosh
01-10-2004 01:02 AM
Hello,
your default route has an administrative distance of 100, possibly there is another route with a lower value that takes precedence ? Can you post the output of the commands:
show ip route
debug dialer events
And also, if possible, the full config of both client side and central side router ?
Regards,
Georg
01-12-2004 11:34 PM
I agree with Georg it is always best to see the entire configurations since so many parts of configurations interrelate.
Two comments:
1. Confirm that your configuration includes a global command "dialer-list 1 protocol ip permit" or something similar to define "interesting traffic" for DDR (dial on demand routing). Without that command, "dialer-group 1" points to a non-existent dialer-list, nothing is interesting, and a dialout will never occur.
2. When using the "dialer string xxxx" command instead of the "dialer map ..." command you should make your related static routes not show the next hop address, but instead simply reference the dialing interface name, as follows:
ip route 0.0.0.0 0.0.0.0 bri0/0 100 (see Georg's point about the 100 value in the command)
We assume 10.202.221.13 is found at the phone number xxxx in the dialer string. Using "dialer string" instead of "dialer map" is easier to configure, but remember that the router then has no clues about where to find the next hop address if it is in a different network than the dialing interface. For that reason we simply make our route statement refer to the dialing interface and not to the next hop.
I hope this is helpful information and is to the point,
Scott
01-13-2004 12:38 AM
hi scallawa,
I am sending u the following configuration.The network is like this,the customer is connected through 256k lease line from our network and he is taken the isdn connection from different service provider.now the customer wants when our link (i.e serial ) goes down then it is autometically fallback to isdn.and that time our network is not come in the picture.that service provider has given him the pool of IP i.e 202.56.224.160/28 ,username is light and password is light and the dialer string is 1501.and that service provider end RAS IP is 202.56.221.13.
Pls help me in this as early as possible
xxxxx# sh run
Building Configuration...done
Current configuration: 1285 bytes
hostname GlobalBHP
user light password 0 light
enable password PUQURUSUTUUU encrypt
service password-encrypt
no service enhanced-secure
dialer-list 1 protocol ip permit
isdn switch-type basic-net3
interface loopback0
exit
interface fastethernet0
ip address 61.17.81.2 255.255.255.192
no ip redirects
no ip proxy-arp
exit
interface serial1/0
physical-layer sync
encapsulation hdlc
ip address 202.9.146.210 255.255.255.252
bandwidth 256
backup interface bri0/0
backup delay 10 30
exit
interface bri0/0
ip address 202.56.224.161 255.255.255.240
dialer pool-member 1
encapsulation ppp
no keepalive
ppp authentication pap
ppp pap sent-username light password light
bandwidth 56
no ip route-cache
dialer string 1503
no ndsp enable
isdn switch-type basic-net3
no mpls route-cache
exit
ip route 0.0.0.0 0.0.0.0 202.9.146.209
ip route 0.0.0.0 0.0.0.0 202.56.221.13 100
line vty 0 4
exec-timeout 0 0
password 7 TYQY\YZYUYUYTZ
login
exit
thanks with regards
santosh
01-16-2004 09:49 PM
Santos,
Save your current configuration and then try this:
conf t
int bri0/0
no dialer pool-member 1
dialer-group 1
dialer string 1503
ppp authentication pap callin
exit
no ip route 0.0.0.0 0.0.0.0 202.56.221.13 100
ip route 0.0.0.0 0.0.0.0 bri0/0 100
end
I believe that will get things going again. Keep in mind you have configured a ten second delay ("backup delay 10 30") before the BRI is to come out of standby mode and begin looking for interesting traffic.
01-27-2004 03:53 AM
Hi scallawa,
your configuration make it working.now everything is working normal.thanks for it.now you tell me one thing now only one channel is working means i am only getting 64kb speed i want my both channel to work.what i have to add in my configuration.
thanks
santosh
01-27-2004 07:07 AM
Hi Santosh, glad to hear it is working.
To have the second channel come up add the command "dialer load-threshold 25 either" to the BRI interface. You can change the 25 to a number between 3 and 254 to adjust when the second channel comes up. A lower number will bring it up sooner. The number you use is divided by 255 to determine what fraction of the channels that are up should be exceeded before the next channel is brought up. Using 25 as the value makes the threshold about 10% (25/255). When the first channel traffic exceeds 10% the second channel will dial, come up, and begin to share the traffic load thereby providing a total bandwidth of 128kb.
You can also add "ppp multilink" to the BRI configuration. This works alongside "diale rload-threshold
scallawa
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