Re: Conditional Advertise

Oh,I see..Got it and thanks

Regards
Anantha Subramanian Natarajan

On Sat, Aug 29, 2009 at 7:57 AM, Ahmed Ejaz <aahmedejaz_at_gmail.com> wrote:

> It just works when you shutdown the first interface i-e NET1 in your case
> which matches the first prefix-list in the route-map. This is fine and I
> tested it but the problem is when you shutdown the other interface it does
> not work.
>
> Ahmed.
>
> On Sat, Aug 29, 2009 at 5:52 PM, Anantha Subramanian Natarajan <
> anantha.natarajan_at_gravitant.com> wrote:
>
>> Hi Ahmed and All,
>>
>> I tried the below configuration and it seem working ...May be I
>> misunderstood something ..Here by providing the topology below and the
>> related config
>>
>>
>> R2(172.16.2.2/30) ----- (172.16.2.1/30)R0(172.16.1.1/30) -----(
>> 172.16.1.2/30)R1
>>
>> R2 BGP AS number is 400,R0 AS number is 100 and R1 AS number is 300
>>
>> R2 is advertising 192.168.1.0/24 ,While R0 is advertising 10.1.10/24 and
>> 20.2.2.2/32.Configured R0 with an advertisemap mentioning to advertise
>> 192.168.1.0/24 provoided only both 10.1.1.0/24 and 20.2.2.2/32 exist.When
>> shutdown 10.1.1.0/24,R1 is not able to see 192.168.1.0/24.Kindly see the
>> below config
>>
>> *R2*
>>
>> router bgp 400
>> no synchronization
>> bgp log-neighbor-changes
>> network 192.168.1.0
>> neighbor 172.16.2.1 remote-as 100
>> no auto-summary
>> !
>> interface Loopback10
>> ip address 192.168.1.1 255.255.255.0
>>
>> *R0*
>> **
>> router bgp 100
>> no synchronization
>> bgp log-neighbor-changes
>> network 10.1.1.0 mask 255.255.255.0
>> network 20.2.2.2 mask 255.255.255.255
>> network 192.168.10.0
>> neighbor 172.16.1.2 remote-as 200
>> neighbor 172.16.1.2 advertise-map ADVERTISE exist-map EXIST
>> neighbor 172.16.2.2 remote-as 400
>> no auto-summary
>> !
>> route-map ADVERTISE permit 10
>> match ip address prefix-list NET3
>> !
>> route-map EXIST permit 10
>> match ip address prefix-list NET1 NET2
>> !
>> ip prefix-list NET1 seq 5 permit 10.1.1.0/24
>> !
>> ip prefix-list NET2 seq 5 permit 20.2.2.2/32
>> !
>> ip prefix-list NET3 seq 5 permit 192.168.1.0/24
>> !
>> interface Loopback10
>> ip address 10.1.1.1 255.255.255.0
>> !
>> interface Loopback20
>> ip address 20.2.2.2 255.255.255.255
>>
>> *R1*
>> **
>> router bgp 200
>> no synchronization
>> bgp log-neighbor-changes
>> neighbor 172.16.1.1 remote-as 100
>> no auto-summary
>>
>> So when I shutdown loopback10 in R0,I stopped seeing 192.168.1.0/24advertised to R1.Am I missing something,kindly let me know
>>
>> Thanks
>>
>> Regards
>> Anantha Subramanian Natarajan
>> **
>> **
>> **
>> **
>>
>>
>>
>>
>>
>> **
>>
>>
>>
>>
>> On Sat, Aug 29, 2009 at 6:58 AM, Ahmed Ejaz <aahmedejaz_at_gmail.com> wrote:
>>
>>> I tried that and it does not work.
>>>
>>> Ahmed.
>>>
>>> On Sat, Aug 29, 2009 at 4:53 PM, Anantha Subramanian Natarajan <
>>> anantha.natarajan_at_gravitant.com> wrote:
>>>
>>>> Hi Sugar Can,
>>>>
>>>> Can you try inside the route-map as below
>>>>
>>>> Match ip address prefix-list <prefix-list1><prefix-list2>
>>>>
>>>> I think whenever we specify the match criteria on same line ,it is an
>>>> AND
>>>> operation
>>>>
>>>> Regards
>>>> Anantha Subramanian Natarajan
>>>>
>>>> On Sat, Aug 29, 2009 at 12:57 AM, Sagar Rane <sagar.ccie_at_gmail.com>
>>>> wrote:
>>>>
>>>> > Hi All,
>>>> >
>>>> > I have requirement where, bgp should check its bgp routing table for
>>>> two
>>>> > routes eq (10.1.1.0/24 and 20.2.2.2/32) and only if both routes are
>>>> > present,
>>>> > it should originate a route advertisement of 192.168.10.0/24.
>>>> >
>>>> > I have tried advertise-map and exist map, but how can we used
>>>> exist-map to
>>>> > check both the routes at the same time?
>>>> >
>>>> > Anyway how we can meet this requirement please let me know.
>>>> >
>>>> > Regards,
>>>> > Sagar
>>>> >
>>>> >
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>>>> >
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Received on Sat Aug 29 2009 - 07:59:50 ART