From: CCIE FUN (ccieexam2002@yahoo.com)
Date: Fri Mar 28 2003 - 13:08:39 GMT-3
As long as the MAC address is unique within an ISIS
area, it does not matter what numbers are used.
However generally it is a good practice to use the
mac-address of your ethernet interface(if
available)and that interface does not have to be up.
so your ISIS net statement would be something like
this
router isis
net 00.0001.0009.7c66.9560.00
here is the output to verify you are routing for
correct isis area.
Router#sh clns pro
IS-IS Router: <Null Tag>
System Id: 0009.7C66.9560.00 IS-Type: level-1-2
Manual area address(es):
00.0001
Routing for area address(es):
00.0001
No interfaces in domain/area.
Redistribute:
static (on by default)
Distance for L2 CLNS routes: 110
RRR level: none
Generate narrow metrics: level-1-2
Accept narrow metrics: level-1-2
Generate wide metrics: none
Accept wide metrics: none
Hunt
i think when the example you used will create an area
00, not 00.0001
here is the output using your ISIS statement.
Router#sh clns protocol
IS-IS Router: <Null Tag>
System Id: 0001.1111.1111.00 IS-Type: level-1-2
Manual area address(es):
00
Routing for area address(es):
00
No interfaces in domain/area.
Redistribute:
static (on by default)
Distance for L2 CLNS routes: 110
RRR level: none
Generate narrow metrics: level-1-2
Accept narrow metrics: level-1-2
Generate wide metrics: none
Accept wide metrics: none
thanks
--- Hunt Lee <huntl@webcentral.com.au> wrote:
> Hi ccie2be,
>
> This is only a suggestion...
>
> You can append anything you make up
>
> e.g. Area ID = 00.0001
>
> So the NET can be = 00.0001.1111.1111.00
>
> Regards,
> Hunt
>
>
> -----Original Message-----
> From: ccie2be [mailto:ccie2be@nyc.rr.com]
> Sent: Thursday, 27 March 2003 7:44 AM
> To: Group Study
> Subject: IS-IS NET clarification
>
>
> Hi,
>
> I hope this isn't a silly question.
>
> In Doyle's book, he says that usually the NET is
> made up from the area ID
> with
> the MAC address appended to it.
>
> I'm wondering is this a rule or a suggestion? And,
> if it's a rule, does it
> matter which MAC address is used?
>
> Since the NET in ISIS is comparable to the Router ID
> in OSPF and applies to
> the router as a whole, it seems to me it shouldn't
> matter what MAC address
> is
> used. And, taking that 1 step further, if it
> doesn't matter what MAC
> address
> is used, perhaps it doesn't matter if a MAC address
> is used at all.
>
> Please set me straight on this. Thanks, Jim
This archive was generated by hypermail 2.1.4 : Sat Apr 05 2003 - 08:51:46 GMT-3