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basic eigrp question

j.stringer
Level 1
Level 1

Please see the config below. (I changed the ASN and the IP addresses so please don't get hung up on that) My goal is to load balance between FA2/0 and FA2/1, and have my default route (network) be both FA2/0 and FA2/1. If either link goes down, (which happens from time to time) will my eigrp traffic still flow through the other available link without issue, taking into account "variance" and "traffic-share"?

interface FastEthernet2/0

description 100 Mb connection to xxx

bandwidth 100000

ip address 10.1.1.6 255.255.255.252

ip access-group 103 in

ip access-group 104 out

no ip redirects

no ip unreachables

no ip proxy-arp

ip route-cache flow

no keepalive

duplex full

speed 100

no cdp enable

!

interface FastEthernet2/1

description 100 Mb connection to xxx

bandwidth 100000

ip address 10.1.1.14 255.255.255.252

ip access-group 103 in

ip access-group 104 out

no ip redirects

no ip unreachables

no ip proxy-arp

ip route-cache flow

no keepalive

duplex full

speed 100

no cdp enable

!

autonomous-system ???

!

router eigrp ???

redistribute connected

redistribute static

network 192.168.0.0

network 10.1.0.0

distance eigrp 9 10

variance 2

traffic-share balanced

no auto-summary

eigrp log-neighbor-changes

!

ip default-network 10.1.0.0

2 Replies 2

pradeepde
Level 5
Level 5

The configuration seems fine. The load balancing should work in this case.

However, I guess the ip default-network works in a classful manner.

So the command given should be ip default-network 10.0.0.0. Refer to this doc for the details.

http://www.cisco.com/en/US/tech/tk648/tk365/technologies_tech_note09186a0080094374.shtml#ipnetwork

In the scenario given by you, load balancing would work without the variance command also, since both the links have the same bandwidth.

Thanks for your reply. I was beginning to wonder if was that basic of a question that no one wanted to give a reply ... haha.

You are right about the ip default-network command. My default network is actually a class "B" address. As I stated, I changed the IP address for security issues. So I would have xxx.xxx.0.0 for my default route. That is a very good catch. Thanks for the info on the variance command as well.

Regards