Di Posting Oleh : Simple Learning
Kategori : Core Technologies RIP Routing
Prerequisites: CCNP level skills.
Topology
Task1
Configure R3 to advertise a default to its RIP neighbors. In case R3's F1/0 interface is down it should stop advertising the default route. (this option does not work if R5's F1/0 interface is down or is inaccessible for some other reason). Do not advertise the default route towards R5.
Lab Solution
Task1
Configure R3 to advertise a default to its RIP neighbors. In case R3's F1/0 interface is down it should stop advertising the default route (this option does not work if R5's F1/0 interface is down or is inaccessible for some other reason). Do not advertise the default route towards R5.
R3 Configuration:
!
ip access-list standard LINK_TO_R5
permit 10.1.35.0 0.0.0.255
!
permit 10.1.35.0 0.0.0.255
!
route-map CHECK_LINK permit 10
match ip address LINK_TO_R5
set interface Serial0/1 Serial0/2
!
match ip address LINK_TO_R5
set interface Serial0/1 Serial0/2
!
router rip
version 2
passive-interface Loopback0
network 10.0.0.0
network 172.16.0.0
default-information originate route-map CHECK_LINK
no auto-summary
version 2
passive-interface Loopback0
network 10.0.0.0
network 172.16.0.0
default-information originate route-map CHECK_LINK
no auto-summary
!
Verification:
Pic. 2 - R1's Routing Table.
Pic. 3 - R5's Routing Table.
Notice!
This method will make R3 to stop advertising the default route only in case the link between R3 and R5 is down.
Shutting down int F1/0 triggers the flash update: 0.0.0.0/0 is poisoned.
Pic. 4 - Flash Update.
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