simple rip question

in ccna icnd book page 163, ther is a example of rip

interface ethernet 0
ip address 10.1.2.3 255.255.255.0
interface ethernet 1
ip address 172.16.1.1 255.255.255.0
interface tokenring 0
ip address 10.1.3.3 255.255.255.0
interface serial 0
ip address 199.1.1.1 255.255.255.0
interface serial 1
ip address 199.1.2.1 255.255.255.0
!
router rip
network 10.0.0.0
network 199.1.1.0

book say that command(under router rip)

network 10.0.0.0

will cover token0 and ethernet0

Can someone tell me why 10.0.0.0 will cover 10.1.2 and 10.1.3 on 255.255.255.0 ??

Big thanks in advance.

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Comments

hankooknara

I guess I will just answer my own question as I see that books says

the network command requires a network number, not a subnet number...

which means

10.0.0.0 is for network A

and 10.1.2.3 255.255.255.0

and 10.1.3.3 255.255.255.0's both network portion is still 10(network A)

someone can correct me if I was wrong.. tx.

dmaftei

hankooknara wrote:

someone can correct me if I was wrong..

You were not wrong.

david_r

Do you know why it is that way? You aren't studying to pass a test, you are studying to build a foundation.

If you had the foundation, you'd know that RIP is a classful protocol and that classful protocols <fill in the blank>.

EdTheLad

david_r wrote:

If you had the foundation, you'd know that RIP is a classful protocol and that classful protocols <fill in the blank>.

If you had the foundation, you'd know that RIP is a classful protocol and that classful protocols are nice but not as nice as classless protocols.

Ripv2 is classless and is advertised using the major classful network.Eigrp is
classless and can be specified using the major network,so not really a good
explanation as to why.Just remember that for distance vector type protocols you advertise using the classful network number.

darkuser

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fipr_c/ipcprt2/1cfrip.htm

hankooknara

thank u all for your help~~

david_r

oddly enough, I don't see either RIPV2 or EIGRP in his config or his question. But thanks for playing.

Loris

david_r wrote:

Do you know why it is that way? You aren't studying to pass a test, you are studying to build a foundation.

If you had the foundation, you'd know that RIP is a classful protocol and that classful protocols <fill in the blank>.

Your reasoning is flawed. network statements are always classed as is the case with RIPv2 & EIGRP... it has nothing to do with the routing protocol itself.