RIP v2 question 5

Is auhentication support in RIP v1 ?

For RIP v2 authentication

Create 30 loopbacks on R1

R2(config)#key chain ?

WORD Key-chain name

R2(config)#key chain AUTH

R2(config-keychain)#key ?

<0-2147483647> Key identifier

R2(config-keychain)#key 123

R2(config-keychain-key)#key-string ?

0 Specifies an UNENCRYPTED password will follow

7 Specifies a HIDDEN password will follow

LINE The UNENCRYPTED (cleartext) user password

R2(config-keychain-key)#key-string 123

R2(config-keychain-key)#exi

R2(config-keychain)#exi

R2(config)#int f 1/0

R2(config-if)#ip rip authentication ?

  key-chain  Authentication key-chain

  mode       Authentication mode

R2(config-if)#ip rip authentication key-chain AUTH

R3(config)#key chain AUTH

R3(config-keychain)#key 123

R3(config-keychain-key)#key-string 123

R3(config-keychain-key)#end

R3(config)#int f 0/0

R3(config-if)#ip rip authentication key-chain AUTH

(Note: after running authentication, RIP  update only contains 24 routes per packet instead of               25)

R3#debug ip rip events

RIP event debugging is on

R3#

*Mar 1 00:30:05.975: RIP: sending v2 update to 224.0.0.9 via FastEthernet0/0 (10.1.13.3) - suppressing null update

R3#

*Mar 1 00:30:24.727: RIP: received v2 update from 10.1.13.2 on FastEthernet0/0

*Mar 1 00:30:24.739: RIP: Update contains 24 routes

*Mar 1 00:30:24.743: RIP: received v2 update from 10.1.13.2 on FastEthernet0/0

*Mar 1 00:30:24.747: RIP: Update contains 6 routes

R3#debug ip rip

RIP protocol debugging is on

R3#debug ip rip events

RIP event debugging is on

R3#

*Mar  1 00:19:15.555: RIP: sending v2 update to 224.0.0.9 via FastEthernet0/0 (10.1.13.3)

*Mar  1 00:19:15.559: RIP: build update entries - suppressing null update

*Mar  1 00:19:15.679: RIP: received packet with text authentication 123

*Mar  1 00:19:15.679: RIP: received v2 update from 10.1.13.2 on FastEthernet0/0

*Mar  1 00:19:15.683:      1.1.1.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.683:      2.2.2.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.687:      3.3.3.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.691:      4.4.4.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.691:      5.5.5.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.695:      6.6.6.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.699:      7.7.7.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.699:      8.8.8.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.703:      9.9.9.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.707:      10.1.12.0/24 via 0.0.0.0 in 1 hops

*Mar  1 00:19:15.707:      10.10.10.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.711:      11.11.11.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.711:      12.12.12.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.715:      14.14.14.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.719:      15.15.15.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.719:      16.16.16.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.723:      17.17.17.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.727:      18.18.18.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.727:      19.19.19.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.731:      20.20.20.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.735:      21.21.21.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.735:      22.22.22.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.739:      23.23.23.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.743:      24.24.24.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.743: RIP: Update contains 24 routes

*Mar  1 00:19:15.743: RIP: received packet with text authentication 123

*Mar  1 00:19:15.743: RIP: received v2 update from 10.1.13.2 on FastEthernet0/0

*Mar  1 00:19:15.743:      25.25.25.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.743:      26.26.26.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.743:      27.27.27.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.743:      28.28.28.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.743:      29.29.29.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.743:      30.30.30.0/24 via 0.0.0.0 in 2 hops

*Mar  1 00:19:15.743: RIP: Update contains 6 routes

For RIPv1 authentication

RIP v1 does not support authentication

R1(config)#key chain new

R1(config-keychain)#key 1

R1(config-keychain-key)#key-string 123

R1(config-keychain-key)#exi

R1(config-keychain)#exi

R1(config)#int f 0/0

R1(config-if)#ip rip auth key-chain new

R2(config)#key chain new

R2(config-keychain)#key 1

R2(config-keychain-key)#key-string 123

R2(config-keychain-key)#end

R2#conf t

R2(config)#int f 0/0

R2(config-if)#ip rip auth key-chain new

R2#debug ip rip

RIP protocol debugging is on

R2#

*Mar  1 00:04:13.811: RIP: sending v1 update to 255.255.255.255 via FastEthernet0/0 (10.1.12.2)

*Mar  1 00:04:13.815: RIP: build update entries

*Mar  1 00:04:13.815:   network 2.0.0.0 metric 1

*Mar  1 00:04:13.819:   network 3.0.0.0 metric 2

*Mar  1 00:04:13.819:   subnet 10.1.13.0 metric 1

*Mar  1 00:04:13.823: RIP: sending v1 update to 255.255.255.255 via Loopback0 (2.2.2.2)

*Mar  1 00:04:13.823: RIP: build update entries

*Mar  1 00:04:13.827:   network 1.0.0.0 metric 2

*Mar  1 00:04:13.827:   network 3.0.0.0 metric 2

*Mar  1 00:04:13.831:   network 10.0.0.0 metric 1

*Mar  1 00:04:13.855: RIP: sending v1 update to 255.255.255.255 via FastEthernet1/0 (10.1.13.2)

R2#

*Mar  1 00:04:13.859: RIP: build update entries

*Mar  1 00:04:13.859:   network 1.0.0.0 metric 2

*Mar  1 00:04:13.863:   network 2.0.0.0 metric 1

*Mar  1 00:04:13.863:   subnet 10.1.12.0 metric 1

R2#

*Mar  1 00:04:16.827: RIP: received v1 update from 10.1.13.3 on FastEthernet1/0

*Mar  1 00:04:16.831:      3.0.0.0 in 1 hops

R2#

*Mar  1 00:04:17.979: RIP: received v1 update from 10.1.12.1 on FastEthernet0/0

*Mar  1 00:04:17.983:      1.0.0.0 in 1 hops