Hi Ned,
~ Can I multilink three primary rate isdn lines to give me one single ~ 6mbs circuit into an 3700 router?
In other words: you want to have 3 30B+D ISDN E1s coming into a 37xx router, and you want to put all 90 B channels into a single multilink PPP bundle.
The answer is, yes, you can do this in most versions of IOS, which have a limit of 255 member links per MLPPP bundle. (Versions from
12.2(13)T thru 12.3(7.8)* only allow 64 links in a bundle.)
I have heard of customers who have successfully bundled three or four E1 PRIs into a single MLPPP bundle.
~ If I can the next question is how can this be achieved for inward and ~ outbound traffic? Inbound traffic will hit the first ISDN line (e.g. ~ phone number 1199911); assuming they use all channels on this how can ~ the second ISDN line be activated (e.g. phone number ~ 2299922)?Similarily, how is the third lot of channels (on phone number ~ 3399933) brought up?
I would use dialer profiles on each side, something like this:
interface dialer 1 encaps ppp dialer pool 1 dialer remote-name OTHERROUTER ppp authentication chap dialer string 1199911 dialer string 2299922 dialer string 3399933 dialer rotor best
interface ser0:23 encaps ppp ppp authentication chap dialer pool-member 1 inteface ser1:23 encaps ppp ppp authentication chap dialer pool-member 1
etc.
Here's an example using multiple BRIs, but multiple PRIs are pretty much the same:
formatting link
~ - or do I need some kind of multiplexer to merge the three 2mblines ~ into a single 6mb? If so what interface module do I need in the router ~ (I assume an E1 only goes to 2mb) ~ TIA, Ned
I would get two NM-*CE1*s for the 37xx.
Regards,
Aaron