From: Joe Harris (JoeH@xxxxxxxxxxxxxxxxx)
Date: Tue Aug 29 2000 - 15:56:08 GMT-3
It's not really a "have to" situation. You see if for instance you are using
a 172.16.0.0 address space. When you define a network command under your
"router eigrp <as>" you are going to do it for a classfull network
(172.16.0.0). Lets say that your ISDN is using a 172.16.32.0/30, well your
network command covers this .32.0 network. When the route drops from the
route table and your bri (or serial or whatever type of interface you are
using for backup) kicks in the router will automatically creates neighbor
routes by default; that is, it automatically sets up a route to the peer
address on a point-to-point interface when the PPP IPCP negotiation is
completed. The static route is there for demonstration purposes. Set it up
in lab, it will work without defining a floating static. Think of it from an
OSPF setup (although it does not support OSPF just yet).
If you have your OSPF ISDN area defined under your "router ospf <as>"
command and you use your ISDN to backup the router's DLCI connection to the
network. After you put your ISDN interface in a backup state, you don't have
to define a floating static route, your "network <address wildcard-mask>
area <area>" command just took care of routing for you.
-----Original Message-----
From: Brian Edwards [mailto:bedwards@juniper.net]
Sent: Tuesday, August 29, 2000 1:21 PM
To: 'Joe Harris'; spope@cablespeed.com
Cc: ccielab@groupstudy.com
Subject: RE: Understanding ISDN Dial Backup
Joe,
I checked out the web page and it shows that you still need a floating
static to the "watched" prefix.
ip route 10.0.0.0 255.0.0.0 BRI0 150 <----route to
remote "floating static route"
Any way around this? Maybe a sceondary IP address of 10.255.255.254/8 on
bri0 (but you can't float a connected). Maybe a RIP and SNAPshot routing to
advertise the 10/8 over the BRI?
/Brian
-----Original Message-----
From: Joe Harris [mailto:JoeH@globaldatasys.com]
Sent: Tuesday, August 29, 2000 10:18 AM
To: spope@cablespeed.com
Cc: ccielab@groupstudy.com
Subject: RE: Understanding ISDN Dial Backup
Use a "dialer watch-list", but it can only be used with eigrp.
http://www.cisco.com/warp/public/793/access_dial/backupwatch.html
-Joe H
-----Original Message-----
From: spope@cablespeed.com [mailto:spope@cablespeed.com]
Sent: Tuesday, August 29, 2000 12:03 PM
To: CCIE (E-mail)
Subject: Understanding ISDN Dial Backup
1. Dialer Profiles w/ backup interface
2. Backup interface
3. Floating static routes
I keep reading that you can't use static routes which leaves me with two
other options. And I read you can't use backup interfaces What else is
there besides dynamic routing??
Thanks for any input.
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 08:24:32 GMT-3