Hmm, groupstudy seems to be eating messages again - sorry if this appears twice.
JMcL
**************
One thing to watch out for is that a frame relay PVC can be down without the
router interface being down. Then the 'backup int' command doesn't kick in,
because the router doesn't realise that the frame relay interface has gone
walkabout.
If this is a problem, you can use floating static routes (static route(s) with
the administrative distance set to something higher than the routing protocol
you use on your FR link) to direct your traffic to the ISDN interface.
Under normal circumstances, with the frame relay link up, routes to R2 will be
sourced from RIP or OSPF or whatever routing protocol you use over the frame
relay link (possibly even a static route). If the frame relay PVC dies, that
route will disappear, and your routing process will pick up the floating static
route instead and send your traffic over the ISDN. Just make sure your
interesting traffic etc is set up for what you want.
Floating static routes aren't quite as simple as the 'backup int' command but
they're a lot more flexible.
JMcL
---------------------- Forwarded by Jenny Mcleod/NSO/CSDA on 19/06/2000 12:04
---------------------------
"Russell Lusignan" <[EMAIL PROTECTED]> on 16/06/2000
02:12:30
Please respond to "Russell Lusignan" <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
cc: (bcc: JENNY MCLEOD/NSO/CSDA)
Subject: Re: ISDN setup
You would use BRI0 interfaces on R1 and R2 as backup interfaces to the
serial interfaces.
R1:
int s0
backup int bri0
backup delay 20 40 // Dial R2 if s0 is down for 20 secs, wait 40 secs to
disconnect once s0 is back up.
!
configure the BRI0 interface to dial R2
R2:
int s0
backup int bri0
backup delay 20 40
!
configure the BRI0 interface to dial R1
Depending on your configuration, you can use Dialer interfaces as the backup
interface that way your BRI can be used for other purposes. This is covered
pretty thoroughly with examples in the Cisco Press ACRC and BCRAN books.
Hope that helps
Russ..
""Omer Shommo"" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Suppose I have router R1 with s0 connected to s0 of router R2 through
Frame relay cloud. Both routers have ISDN
> interfaces. How do I configure the ISDN interface of R1 to automatically
dial R2 in case the serial link is down?
>
> Omer
>
>
>
>
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