Re: BGP

Hi Bryan,
        I didn't mean that we only use Update source in loop back case.yes
but my statement shows that.Actually I have to write like that in this case
we don't need update source because I'm not using any loop back and neither
any other physical on which the source make a problem . And this problem is
not related to configuration it was from dynamips I just save all
configuration and restart my dynamips and its work fine .So it seems that
there is some bugs also in dynamips ?

On Wed, May 6, 2009 at 8:32 PM, Bryan Bartik <bbartik_at_ipexpert.com> wrote:

> Marish,
>
> I think you should reconsider the statement "we only update source when we
> r using loop back address but I'm using physical address." Is that really
> the only case? :-) You should try some debugging to compare the addresses
> being used for BGP packets to the IP addresses you have configured for BGP
> neighbors. Debugging ip bgp or debugging ip packet with an ACL matching port
> 179 may help.
>
> Bryan Bartik
> CCIE #23707, CCNP
> Sr. Support Engineer - IPexpert, Inc.
> URL: http://www.IPexpert.com
>
> On Wed, May 6, 2009 at 9:32 AM, marish shah <contactmarish_at_gmail.com>wrote:
>
>> Hi
>> I think Ravi we only update source when we r using loop back address
>> but I'm using physical address so in this case no need for update source
>> command. And as I mention above static route through R1 - R6 - SW1 is
>> working fine . But when remove static from there and create from R1 - R3 -
>> SW1 its not working . So when I look close to my configuration I found
>> that
>> there is some routing configuration mistake in eigrp So I correct it but
>> still same result I also do Clear but no benefit .Ok let me try to
>> explain
>> my topology I'm using IEW lab I verion 5
>>
>> R6..Fas0/0.146>155.1.146.6 is connected with R1..Fas0/0>155.1.146.1.Then
>> R1..Ser1/0>155.1.13.1 is connected with R3..Ser1/3>155.1.13.3.Then
>> R3..E0/0>155.1.37.3 is connected with SW1..Fas1/3>155.1.37.7.And
>> SW1..Vlan67>155.1.67.7 is connected with R6...E0/1>155.1.67.6.
>> R6----R1----R3---SW1
>> | |
>> |_____________ |
>>
>> So I experience today It is shows that you should do BGP relationship
>> through that path from which you r getting routes via IGP.
>>
>> Any seggeations ......Please.
>>
>>
>> Thanks.
>>
>>
>> On Wed, May 6, 2009 at 5:17 PM, Ravi Singh <way2ccie_at_googlemail.com>
>> wrote:
>>
>> > HI Marish,
>> >
>> > Have you configured the update-source command in your BGP config. My
>> > guess is that when you are configuring the static towards SW1 , the
>> > source address of the BGP packet will be of the interface that you
>> > have configured as the peering address of R1. While when R1 is
>> > dynamically learning the information through EIGRP the source address
>> > is different than what the BGP process is expecting it to. Also, what
>> > addresses are you using for the peering. Physical addresses or
>> > loopbacks ??
>> >
>> > Ravi
>> >
>> > On Wed, May 6, 2009 at 2:56 PM, marish shah <contactmarish_at_gmail.com>
>> > wrote:
>> > > Hi Expert,
>> > > Im doing BGP lab I create BGP neigh relationship between R1
>> and
>> > > SW1 but its not coming I also run eigrp because it is not
>> > > directly neigh so from eigrp I'm getting route of SW1 and I'm also
>> able
>> > to
>> > > ping but in bgp sh ip bgp summ command R1 status with Sw1 is active
>> > .means
>> > > there is no bgp neigh relation.
>> > > Actually from R1 there is two path to reach Sw1
>> > >
>> > > SW1 - R6- R1-connected with R3 and R3 - Sw1 mean there is ring
>> topology
>> > >
>> > > R1 getting routes from Sw1 via R3 and I create and my bgp neigh
>> from
>> > R1 -
>> > > R6 - sw1
>> > >
>> > > So my Q is that is bgp neigh relation is also depend on IGP
>> > > path selection.Because when I create static to words Sw1 by using same
>> > path
>> > > where I configure my BGP neigh relation its work R1 - R6 - Sw1 its
>> work
>> > > fine.
>> > > But removing static neigh state becomes again active because eigrp
>> > getting
>> > > sw1 routes via R3 .. R1 - R3 -Sw1
>> > >
>> > > Thanks.
>> > >
>> > >
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>> > >
>> > >
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Received on Thu May 07 2009 - 14:42:09 ART