IP ROUTE QUESTION 2

[maczen]

I am including an excerpt from a Cisco article..

"Static routes that point to an interface on a connected router will be advertised by way of Routing Information Protocol (RIP) and EIGRP regardless of whether redistribute static commands are specified for those routing protocols. This situation occurs because static routes that point to an interface are considered in the routing table to be connected and hence lose their static nature"

Does this mean that my static route will:
A. Be redistributed without a "redistribute static" via routing protocols
B. Have an administrative distance of 0
As long as I point to interface and not an IP addy???

Because this is a cool little trick if that is the case...

B Haines
CCNA R&S, ETA FOI

 

[Cluebird]

Yes to both.

 

[maczen]

Also, to trigger this efefct would I have to use an interface as the destination or can I use the IP as destination and interface as the gateway?

IE.

IP ROUTE 192.168.3.0 255.255.255.0 S0/2

So if S0/2 takes me to 10.0.0.0 then I have a route with admin dist 0 that will be redistributed? I am going to have to play with this because that makes you wonder what if anything will happen if you include an admin distance value...

IP ROUTE 172.16.2.0 255.255.255.0 FA0/1 10
Would it be admin dist 0 or admin dist 10?

B Haines
CCNA R&S, ETA FOI

 

[Cluebird]

If you modify the AD, you make the route "float". It won't be in the routing table if there is another path with a lower AD to the destination. While you're playing with statics try this...Make a floating static route with AD 120 and run RIP over the same network. What route will be in the routing table? Do the same with EIGRP and float a static with AD 90.

Have fun...this is beyond CCNA studies, though.

 

[burtsbees]

Floating static routes are also used a lot for backup links.

Burt

 

[maczen]

K will do!!! Thanks...

B Haines
CCNA R&S, ETA FOI

 

[maczen]

Ha!.. They are both listed.. So do they load balance???
This is after configuring two interfaces equally and adding this static..
ip route 172.16.1.0 255.255.255.0 Serial0/1/1 120

Router#sh ip route
......OMITTED.......

172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
R 172.16.0.0/16 [120/1] via 192.168.1.2, 00:00:14, Serial0/1/0
[120/1] via 192.168.1.6, 00:00:14, Serial0/1/1
S 172.16.1.0/24 is directly connected, Serial0/1/1
192.168.1.0/30 is subnetted, 2 subnets
C 192.168.1.0 is directly connected, Serial0/1/0
C 192.168.1.4 is directly connected, Serial0/1/1
Router#

B Haines
CCNA R&S, ETA FOI

 

[maczen]

Clue, Burt.. was this right? Please elaborate..

R 172.16.0.0/16 [120/1] via 192.168.1.2, 00:00:14, Serial0/1/0
[120/1] via 192.168.1.6, 00:00:14, Serial0/1/1

Really curious about this one.. I did this in Packet Tracer 5 (Sorry, was a chance to play with it and I had not done so yet).. Do I need to do this again with my lab or did it simulate correctly? It added both routes equally.. Both the RIP learned route as well as the floater...


B Haines
CCNA R&S, ETA FOI

 

[Cluebird]

The RIP routes will load balance between the S0/1/0 and s0/1/1 interfaces. The actual effect of the load balancing will depend on if you're using cef, fast-switching, or packet-switching but you can expect to see the effect on a per-flow basis with the newer switching methods.

 

[burtsbees]

Even more fun with EIGRP, as you can mess with the...crap...what's the name of that...it's like a multiplier...crap...

Burt

 

[Cluebird]

variance

 

[burtsbees]

Thanks. NOW I can sleep...*WHEW*

Burt

 

[maczen]

That's awesome.. Thanks guys

B Haines
CCNA R&S, ETA FOI

 

[burtsbees]

http://www.tek-tips.com/viewthread.cfm?qid=1499174&page=1

As a reference...

Burt

 

[maczen]

Thanks for the link.. That is definitely a useful tek-tip... lol

Sorry for the lack of posting.. Racing Cluebird to for the CCNA Security.. J/K.. But I am back in certification mode..

B Haines
CCNA R&S, ETA FOI