advertisment Network in EIGRP

alsayed · ‎05-01-2007

Hello

R1

Potchannel1

ip address 192.168.100.41 255.255.255.252

R2

Potchannel1

ip address 192.168.100.42 255.255.255.252

R1

router eigrp 1

network 192.168.100.40 0.0.0.3

no auto-sumary

R2

router eigrp 1

network 192.168.100.40 0.0.0.3

no auto-sumary

1)IS this a good advertisment in EIGRP?

10xs

sundar.palaniappan · ‎05-01-2007

Ali,

Your configuration is correct and it should work fine. Alternatively, you can configure the network statement with a wild card mask of all 0's as shown below and this would avoid any problems arising out of wild card mask miscalculation.

R1

router eigrp 1

network 192.168.100.41 0.0.0.0

no auto-sumary

R2

router eigrp 1

network 192.168.100.42 0.0.0.0

no auto-sumary

HTH

Sundar

alsayed · ‎05-01-2007

Hi Sandar!

10xs for ur reply

What do u mean by this!!!!!!would avoid any problems arising out wild card mask miscalculation????

i have to know when i discuss this topic with my technical manager

Regards

ALI

sundar.palaniappan · ‎05-01-2007

Sure, let's take your configuration and add another interface as shown below but you want to run EIGRP only on the first portchannel interface. Let's say someone fat fingered the network statement with a wild card mask of '0.0.0.255' then you would end up enabling EIGRP on both interfaces.

R1

int Potchannel1

ip address 192.168.100.41 255.255.255.252

int portchannel2

ip add 192.168.100.45 255.255.255.252

R1

router eigrp 1

network 192.168.100.40 0.0.0.255

no auto-sumary

All you are doing with the network statement is enabling EIGRP on an interface and if using a mask of all 0's would do it then why sit there and calculate the wild card mask unnecessarily. Moreover, keeping things simple where you can isn't a bad strategy at all :-)

HTH

Sundar