Thursday, September 23, 2010

Fragmentation..




and a very good link to go for it.

http://www.cisco.com/en/US/tech/tk827/tk369/technologies_white_paper09186a00800d6979.shtml

Tuesday, September 7, 2010

Inter vrf routing(Static)

Objective is to ping from one vrf to the other vrf.

SETUP
========

R1 R2 and R3 three routers are there.

We need to ping from R1 (RED vrf ) to R3 (BLUE vrf).


R1-RED-----------------RED--R2--BLUE------------------BLUE--R3

1.1.1.1 1.1.1.2 2.2.2.1 2.2.2.2


101#ping vrf RED 2.2.2.2 ------------à pinging vrf BLUE’s 2.2.2.2 from R1’s VRF RED.

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms

101#

===============================================

101#sh running-config interface e0/0

Building configuration...

Current configuration : 86 bytes

!

interface Ethernet0/0

ip vrf forwarding RED

ip address 1.1.1.1 255.255.255.0

end

101#

101#sh running-config | in route

ip route vrf RED 0.0.0.0 0.0.0.0 1.1.1.2

101#

===================

102#sh running-config | in route

ip route vrf RED 2.2.2.0 255.255.255.0 Ethernet1/0 2.2.2.2

ip route vrf BLUE 1.1.1.0 255.255.255.0 Ethernet0/0 1.1.1.1

102#

102#

102#sh run

102#sh running-config in

102#sh running-config interface e0/0

Building configuration...

Current configuration : 86 bytes

!

interface Ethernet0/0

ip vrf forwarding RED

ip address 1.1.1.2 255.255.255.0

end

102#sh run

102#sh running-config in

102#sh running-config interface e1/0

Building configuration...

Current configuration : 87 bytes

!

interface Ethernet1/0

ip vrf forwarding BLUE

ip address 2.2.2.1 255.255.255.0

end

102#

=================

103#sh running-config interface e1/0

Building configuration...

Current configuration : 87 bytes

!

interface Ethernet1/0

ip vrf forwarding BLUE

ip address 2.2.2.2 255.255.255.0

end

103#

103#

103#sh run

103#sh running-config | in route

ip route vrf BLUE 0.0.0.0 0.0.0.0 2.2.2.1

103#