Show ip route output question

fillthy

Doing some tests and came across this question:

What can be determined from the line of "show ip route" output shown below
R 10.10.10.8 [120/2] via 10.10.10.6, 00:00:25, Serial0/1

choose two

1. The ip address 10.10.10.8 is configured on S0/1

2. The 10.10.10.8 network is 2 hops away from this router

3. The next routing update can be expected in 35 seconds

4. This route is using the default administrative distance

5. The ip address 10.10.10.6 is configured on S0/1

Thanks
Phil

I know the answers but confused..I want to see what other people get and why/why not

Netstudent

2 is correct because that is a RIP metric, hop count, It is two hops away.
and 4 is correct. 120 is the deafult AD for RIP.

r_durant

How about 5, isn't that correct as well?

Netstudent

I believe serial 0/1 is the local interface in the output, not the next hop. Thats the interface the route came in on.

r_durant

I'm not saying it's the next hop, but isn't the statement correct based on the information given?

5. The ip address 10.10.10.6 is configured on S0/1...which is serial 0/1 is the local interface in the output and the ip address 10.10.10.6 is configured on that address???

Netstudent

10.10.10.6 is the next hop. Think of it as the default gateway to the 10.10.10.8 network.
But all these IP's look like they are in the same subnet. Which is odd.

r_durant

Oh ok, that's probably what's got me confused then...

Paul Boz

To better understand the ip router table read the output like it's a sentence and not a statement.

When I see the following:

R 10.10.10.8 [120/2] via 10.10.10.6, 00:00:25, Serial0/1 

I read it like this:

"This is a RIP update about network 10.10.10.8, with the default RIP AD, and is two hops away. The route is coming via interface s0/1 on a neighbor router with the network address of 10.10.10.6 configured on the connected interface."

Mind you, I don't break down every router table statement like that any more, but when I was learning this stuff it helped immensely. The biggest hurdle to overcome when learning this stuff is putting it into identifiable human terms. It's much easier to imagine the router is having a conversation with you (you request information, it gives it to you, and you interpret it) than to "talk at" the router.

Netstudent wrote:

10.10.10.6 is the next hop. Think of it as the default gateway to the 10.10.10.8 network.
But all these IP's look like they are in the same subnet. Which is odd.

It looks to me like they're on different /29 subnets.

Netstudent

Paul Boz wrote:

"This is a RIP update about network 10.10.10.8, with the default RIP AD, and is two hops away. The route is coming via interface s0/1 on a neighbor router with the network address of 10.10.10.6 configured on the connected interface."

But the serial 0/1 in the output is that routers local interface that the route came in on right! You just made it sound like the serial0/1 interface is on the neighbor router. If that were the case then 5 would be correct. serial0/1 should be local and 10.10.10.6 should be the next hop right.

Paul Boz

Yeah you're right, that's what I get for posting at 4am after no sleep for 26

Netstudent

OKay cool, I just wanted to make sure I didn't give out false information. You work nights?

Paul Boz

Yeah, I work 8pm to 6am but I picked up a weekend shift for someone on the fly, so rather than being on my usual work sleep schedule I had to go in after being out in the sun all day. Talk about miserable.

FIreFr0zE

Netstudent wrote:

Paul Boz wrote:

"This is a RIP update about network 10.10.10.8, with the default RIP AD, and is two hops away. The route is coming via interface s0/1 on a neighbor router with the network address of 10.10.10.6 configured on the connected interface."

But the serial 0/1 in the output is that routers local interface that the route came in on right! You just made it sound like the serial0/1 interface is on the neighbor router. If that were the case then 5 would be correct. serial0/1 should be local and 10.10.10.6 should be the next hop right.

Could you elaborate your explanation? I still don't get what you mean. kind of confusing? Ialso encounter this prob, from my point of view the serial 0/1 is the local interface of the router that having the ip address of 10.10.10.6. But your explanation tells me that serial 0/1 is not the local interface and it is the neighbour local interface. So ans no. 5 is it the correct ans or not?

I suppose to be correct right? the ans for 5 is applicable right?

but base on your explanation sounds like 5 is incorrect yet you say correc. What you guys means is it serial 0/1 is not compulsory to be the address of 10.10.10.6 right? 10.10.10.6 might be neighbour address and the serial 0/1 definately indicate that the route all done tru the local serial 0/1 interface? all transaction are going in and out through this interface?

am i right to say that?

Netstudent

whoa this is an old post. I had to read throught it to remember what is was about. BUt anyways 5 is not correct. IN the routing table entry, the 10.10.10.6 is next hop and serial0/1 is the local interface used to transmit data to the destination network 10.10.10.8. Data destined for 10.10.10.8 will be placed in the output qeue on serial 0/1.

FIreFr0zE

Netstudent wrote:

whoa this is an old post. I had to read throught it to remember what is was about. BUt anyways 5 is not correct. IN the routing table entry, the 10.10.10.6 is next hop and serial0/1 is the local interface used to transmit data to the destination network 10.10.10.8. Data destined for 10.10.10.8 will be placed in the output qeue on serial 0/1.

Thanks man that clear my doubt! tmr im taking CCNA exam im so worry... i tried the test on the techexam cisco link and gotton 75% nia sad... btw thx alot i got the meaning already.