Greetings all,
Got a question on routing with ISDN backup. Could
someone shed some light on how to properly implement
the backup command with routing?
I'm using the backup command, and ip unnumber for both
primary and backup interfaces.
int loop 0 R3 int s0/0---------primary------int s2 R5
int loop 0 (5.0.0.5)
int di1-----------backup-------int di1
Below is config.
What static route can I use to complete the routing to
the remote end? Because unnumbered addresses is use,
I'm unsure what the static route should look like.
The only thing I can think of is using floating
static, but that sort of defeat the purpose of the
backup command.
ClueLess
!
hostname r3
!
interface Loopback0
ip address 3.0.0.3 255.255.255.0
no ip directed-broadcast
!
interface Serial0/0
backup interface Dialer1
ip unnumbered Loopback0
no ip directed-broadcast
clockrate 64000
!
interface BRI0/0
no ip address
no ip directed-broadcast
encapsulation ppp
dialer pool-member 3
isdn switch-type basic-ts013
isdn answer1 33333333:3
ppp authentication chap
!
interface Dialer1
ip unnumbered Loopback0
no ip directed-broadcast
encapsulation ppp
dialer remote-name r5
dialer string 55555555:5
dialer pool 3
dialer-group 1
ppp authentication chap
!
dialer-list 1 protocol ip permit
r3#sh ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M
- mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA -
OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA
external type 2
E1 - OSPF external type 1, E2 - OSPF external
type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS
level-2, * - candidate default
U - per-user static route, o - ODR
Gateway of last resort is not set
3.0.0.0/24 is subnetted, 1 subnets
C 3.0.0.0 is directly connected, Loopback0
r3#
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