From: Mark S. Detrick (mark@xxxxxxxxxxx)
Date: Mon Sep 06 1999 - 15:15:34 GMT-3
CCIE Crew,
Some info on the esi and nsap addresses.
The esi is a total of 7 bytes. How I come up with an esi is by doing a sh
int and the first interface that comes up with a bia I use those 6 bytes and
the last byte is the sub-interface number. You don't have to do it this
way, but it is unique and no other device will have it.
To get the nsap you first need to do these statements under that main atm
interface:
atm pvc 5 0 5 qsaal
atm pvc 16 0 16 ilmi
After these statements are in the router it will start to communicate with
the ASP, usually a LS1010. At this point you can do a show lane default.
The show lane default command will display the default nsaps for various
servers on the ASP. The nsap address is made up of 20 bytes. You will
notice that on the sh lane def, all the nsaps have the same first 13 bytes.
There are dots in certain locations to help separate the numbers so that it
can be visualized easier. Use the first 13 bytes in everything you need a
nsap and just change the esi ending, which happens to be the last 7 bytes.
Now you have a 20 byte nsap address. Cisco actually creates the first 13
bytes of the nsap for you. The first 13 bytes will be unique to each
LS1010.
When an esi is specified in a command it is not just there, it is assumed
that the default first 13 bytes is appended to the front of it creating the
nsap. It is just a convenience command so that you don't have to put the
whole nsap in.
Mark Detrick
> refernce: Caslow p267
>
>
> interface ATM0
> ip addr 172.16.10.1 255.255.255.0
> atm es-address 11110000000.00 <---Is that just there ?
> atm pvc 10 0 5 qsaal <---Well know PVC needed for SVC setup
> atm pvc 20 0 16 ilmi <---Well know PVC needed for SVC setup
> map-group CCIE <--- equivalent of 'frame-relay map'
>
> map-list CCIE
>
> ip 172.16.1.2 atm-nsap 47.09181000000006177775444.222200000000.000
<--Where
> the heck does he het the nsap addres from ? From the "show interface
atmX"
> of interface 172.16.1.2 ?
>
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