EIGRP Routing Issue

[s.kanth]

Hi All,

I have a simple topology ,running EIGRP internally.

Advertising VLAN 1 in top four devices R1,R2,SW1 and SW2. ( topology attached)
BUT not adversting L0 IP scope in R1 router.
SW3 acts as L2 switch and 192.168.10.1 is set to default gateway on SW3.

to reach 192.168.10.254 ,static router added in SW1 and SW2. - works fine !!!

ip route 192.168.10.254 255.255.255.255 192.168.10.1  ( point to R1 VLAN 1 IP ).

Issue:

I was not able to reach 192.168.10.254 from SW3 switch

then I added static router "ip route 192.168.10.254 255.255.255.255 192.168.10.1" - NO luck.

I simplely add  "network 192.168.10.254 0.0.0.0" under EIGRP of R1 and able to reach the IP from SW3.

Doubts

why SW3 could not reach L0 ip , since we have static entry and that is connected router on R1.

did I miss somthing here ,please guide me :-).

Thanks

Sri

[acampbell]

Hi,

Can you share your R1 config- I would like to see how you have configured the eigrp.

Regards,
Alex.
Please rate useful posts.

[s.kanth]

Hi Alex,

I dont wanna advertise 192.168.10.192/26 whole subnet.

Routing config of all devicess

R1#sh run | s r ei
network 192.168.10.0 0.0.0.63
network 192.168.10.254 0.0.0.0

SW1# sh run | be ei

network 192.168.10.0 0.0.0.63
network 10.20.1.0 0.0.0.255

ip route 192.168.10.254 255.255.255.255.255 192.168.10.1

SW2# sh run | be ei

network 192.168.10.0 0.0.0.63
network 10.20.1.0 0.0.0.255

ip route 192.168.10.254 255.255.255.255.255 192.168.10.1

SW3# sh run | i gate

ip default-gate 192.168.10.1

[Ha Dao]

There is only 1 network in your diagram, why do you need routing here ?

[s.kanth]

We have two different subnets ..

network 192.168.10.1/26

netowrk 192.168.10.192/26

[riyaaz000]

hi Kanth,

Your question and topology are confusing. please elaborate it more clearer.

regards

[s.kanth]

Hi Riyaaz,

Two networks defined on R1 router

network 192.168.10.1/26   (VLAN 1)

netowrk 192.168.10.192/26  (Loopback 0)

I dont have advertise L0 subnet in EIGRP. and make it reachable from all switches (may be with static route)

thanks

sri

[acampbell]

Sri,

When you configure loop0

!

int loop 0

desc R1-loop0

ip address 192.168.10.254 255.255.255.192

no shut

!

Then you advertise this interface/network in EIGRP

!

router eigrp 1

network 192.168.10.254 0.0.0.0

!

Although you are defining the eigrp network state,ment as a HOST (0.0.0.0 mask)

The subnet that the interface belongs to gets advertised

IE// You will be advertising 192.168.10.192/26

Make sure you have added a couple of commands

!

ip subnet-zero

!

router eigrp 1

no auto-summary

!

Regards,
Alex.
Please rate useful posts.