Case study::
The Customer is connecting to the same ISP from two different locations for
redundancy purposes. The primary connection to the ISP is the one from R1, THE
MAIN IDEA is to have the traffic flowing via the connection between R1 and R2
to the ISP in case the link to ISP via R1 goes DOWN (OSPF is running between R1
and R2)....Can you guys advice taking intno account that there's ip unnumbered
to FastEthernet0/0 in Multilink 1 and local network that IP address as gateway
to the Internet.
Public INTERNET
| |
| |
___|__ ___|__
| | | |
| ISP | | ISP |
|Border| |Border|
------ ------
| |
| |
| |
__|__ ___|__
| | | |
| ISP | \ | ISP |
| Core| \ / | Core |
----- /\ ------
| / \ |
| / \ |
__|_/_ _\|___
| | | |
| ISP | | ISP |
| Aggr.| | Aggr.|
------ ------
| |
| |
| |
_|__ _|__
| | | |
| R1 |----------| R2 |
---- ----
| |
| |
| |
[ R1 - Customer ABC site#1 ]
interface Multilink1
ip unnumbered FastEthernet0/0
no cdp enable
ppp multilink
multilink-group 1
!
interface Multilink2
ip address 172.16.0.246 255.255.255.252
no cdp enable
ppp multilink
multilink-group 2
!
interface Serial0/0:0
no ip address
encapsulation ppp
ppp multilink
multilink-group 1
!
interface Serial0/1:0
no ip address
encapsulation ppp
ppp multilink
multilink-group 1
!
interface FastEthernet0/0
ip address 192.168.0.129 255.255.255.224
!
ip route 0.0.0.0 0.0.0.0 Multilink1
!
router ospf 100
log-adjacency-changes
network 172.16.1.244 0.0.0.3 area 0
[ R2 - Customer ABC site#2 ]
interface Multilink1
ip unnumbered FastEthernet0/0
no cdp enable
ppp multilink
multilink-group 1
!
interface Multilink2
ip address 172.16.0.245 255.255.255.252
no cdp enable
ppp multilink
multilink-group 2
!
interface Serial0/0:0
no ip address
encapsulation ppp
ppp multilink
multilink-group 1
!
interface Serial0/1:0
no ip address
encapsulation ppp
ppp multilink
multilink-group 1
!
interface FastEthernet0/0
ip address 192.168.0.1 255.255.255.224
!
router ospf 100
log-adjacency-changes
network 172.16.1.244 0.0.0.3 area 0
!
Regards
Bruno Filipe
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