Re: Metric Reducing in RIP

Actually, it only worked in theory in my head, the reality in IOS was
different I found.

I am not able to replicate this in lab environment, so I am not able to
decrement RIP metric without resorting to redistribution.

Too bad... :-/

Atle Hardarson

On Fri, Dec 31, 2010 at 12:03 PM, <v.shekhar_at_globalassurance.net> wrote:

> Interesting!
> I tried it out without much success.
>
> I can see hits on my ACL:
> R2#sh access-list
> Extended IP access list 100
> 10 permit udp any any eq rip (26 matches)
>
> However there were no matches on my Route-Map.
>
> R2#sh route-map
> route-map RM_RIP, permit, sequence 10
> Match clauses:
> ip address (access-lists): 100
> Set clauses:
> metric +2
> Policy routing matches: 0 packets, 0 bytes
>
> RM is applied on interface:
> R2#sh run int e0
> Building configuration...
>
> Current configuration : 106 bytes
> !
> interface Ethernet0
> ip address 192.168.0.2 255.255.255.0
> ip policy route-map RM_RIP
> half-duplex
> end
>
> Its the correct interface because we can see the ACL counter increasing.
> However RM does not show any matches and there is no change in the route
> metric too.
>
> Atle: Does this work in your LAB? Can you send the config please?
>
>
> -Vijay Shekhar
> CCIE(sec)#17589/CISSP/RHCE.
> http://au.linkedin.com/in/vshekhar
>
> Quoting Atle Xrn Hardarson <atle.hardarson_at_gmail.com>:
>
> Hi guys
>>
>> I believe you can achieve this with PBR as such:
>>
>> R1(config-route-map)#set metric ?
>> +/-<metric> Add or subtract metric
>> <0-4294967295> Metric value or Bandwidth in Kbits per second
>> <cr>
>>
>> #show route-map RIP
>> route-map RIP, permit, sequence 10
>> Match clauses:
>> ip address (access-lists): 101
>> Set clauses:
>> metric -10
>>
>> So just match the traffic with tags or ACL (UDP/520 for RIPv2 IPv4, RIPv2
>> has no protocol ID) and manipulate the metric with a route-map.
>>
>> Cheers
>> Atle Hardarson
>>
>>
>>
>> On Thu, Dec 30, 2010 at 12:21 PM, <v.shekhar_at_globalassurance.net> wrote:
>>
>> I am quite amazed to see the LOOSELY worded description on Cisco Context
>>> sensitive help that uses the word "Subtract".
>>>
>>> I never paid attention to that and only believed when i tried out myself.
>>>
>>> From what my experience is worth there is no easy way to reduce the
>>> metric
>>> in RIP. U can take the trouble of doing that by redistributing rip to
>>> other
>>> IGP and back to RIP though.
>>>
>>> -Vijay Shekhar
>>> CCIE(sec)#17589/CISSP/RHCE.
>>> http://au.linkedin.com/in/vshekhar
>>>
>>>
>>> Quoting lijo varghese <lijoccie_at_gmail.com>:
>>>
>>> Hai.....
>>>
>>>>
>>>> How can i reduce the metric in RIP.....
>>>> Is it any way to reduce hop count by using offset list ?
>>>>
>>>>
>>>> In " cisco command "
>>>>
>>>> R1(config-router)# ?
>>>> offset-list Add or subtract offset from RIP metrics
>>>> -----------
>>>>
>>>>
>>>> So is it used to reduce metric(Hop count) ?
>>>>
>>>> Is there any way to reduce hopcount in RIP without using tunnels
>>>> ?.............
>>>>
>>>>
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Received on Fri Dec 31 2010 - 13:51:01 ART