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TOPIC: OSPF Redundancy

OSPF Redundancy 5 years 2 months ago #37253

  • payeh
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Hi all,

I have a problem about how to make OSPF redundancy, lets me explain the condition(refer to the diagram):





http://www.mediafire.com/file/r78jzaglgu2z3mz/ospf3.pkt

There are 4 layer 3 switches:
- 2 Core switches (C1 & C2)
- 2 Distributions (D1 & D2)

C1
Vlan 2 -192.168.1.2/29
Vlan 3 -192.168.2.2/29

C2
Vlan 2 -192.168.1.3/29
Vlan 3 -192.168.2.3/29

D1
Vlan 2 -192.168.1.4/29
Vlan 4 -10.10.10.1/24

D2
Vlan 3 -192.168.2.4/29
Vlan 5 -10.10.20.1/24

I can ping from PC0 to PC1, but I when i test redundancy by shutdown LINE 1 its not working. Ping is dropped. I dont know what the problem (maybe something wrong with configuration).
I have uploaded pracket tracer file. Hope anybody can help me.



Many Thanks,
Payeh
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Re: OSPF Redundancy 5 years 2 months ago #37254

  • Nevins
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I haven't done a lot with layer 3 switching but the links between switches be trunk links right?

[code:1]D1#show interfaces trunk

D1#[/code:1]


[code:1]!
interface FastEthernet0/1
switchport access vlan 2
!
interface FastEthernet0/2
switchport access vlan 4
!
interface FastEthernet0/3
switchport access vlan 2
![/code:1]


Try this link

pre.visualland.net/view.php?cid=939&...r%203%20switch%20lab

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Re: OSPF Redundancy 5 years 2 months ago #37258

  • S0lo
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I had a look at it, There were 3 main problems:

1. Fa0/3 on D2 is on VLAN5. It should be on VLAN 3, since the other end of the cable is on VLAN 3
2. C2 was not doing routing. So I added the ip routing command.
3. Networks 10.10.10.0/24 and 10.10.20.0/24 were advertized on OSPF area 2. I moved them to area 1. If you want them on area 2 then I think you have REDISTRIBUTE routes.

I also removed all static routes since OSPF can do the job. After those changes, the 2 PCs can ping each other no matter what single cable you remove. If it doesn't work immediately after you remove a cable, just wait for it so that OSPF converges. Here is the fixed file:

www.mediafire.com/?usd233dd8p27glg
Studying CCNP...

Ammar Muqaddas
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www.firewall.cx
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Re: OSPF Redundancy 5 years 1 month ago #37260

  • rizin
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Good Job Ammar :)
Known is a drop, unknown is an Ocean
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Re: OSPF Redundancy 5 years 1 month ago #37261

  • S0lo
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Thanks rizin :) hope it help payeh.
Studying CCNP...

Ammar Muqaddas
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www.firewall.cx
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Re: OSPF Redundancy 5 years 1 month ago #37262

  • payeh
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Thanks all for the reply,

To Solo,
So you just make changes:
1-change f0/3 to vlan 3
2-add ip routing on c2
3-move Networks 10.10.10.0/24 and 10.10.20.0/24 to area 1

did u put ip for the loopback interface?

FYI i cannot open your file because im using the older version of packet tracer,if possible maybe you can provide me link to download latest version.

Many thanks
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