From: The Great Ryan (pv.ryan@gmail.com)
Date: Wed Oct 26 2005 - 13:08:07 GMT-3
Thanks for your reply.
I asked this because i found that the Non mvpns-bgp format (or the
original format) can't store the command "neighbor next-hop-unchanged"
i.e. I can type it in configuration mode but I can't see it by "show
running-config"
I'm using C2621XM with (C2600-JS-M) 12.2(15)T17.
However, this command can be stored in address-fam ipv4 format. That's
meant if I write erase the configurartion and restore it by "show
running" output, I can restore everything.
That's why I want to know the difference between these two formats. If
no, I may use it, just in case.
Thanks !
Ryan
2005/10/26, Andrew Lissitz (alissitz) <alissitz@cisco.com>:
>
> Hey Ryan,
>
> Afaik this command is used for inter-as mvpns (mpls vpn customers with
> links in two or more ISPs).
>
> There are different options for the different address families.
> Curiosity... is this needed for a lab you are working on?
>
> Once you type address-fam ipv4 (without a VRF at the end) you will be
> working in the same default address family you have when you type router
> bgp x. Now ... try getting rid of the command address-fam ipv4 ... once
> you typed it, IOS really wants to keep it there. You will need to
> either continue to work with this address-fam listed or remove bgp and
> re-add bgp. Strange how you can not get rid of this address-fam since
> it is the default address family for bgp.
>
> Does this answer your question Ryan?
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> The Great Ryan
> Sent: Wednesday, October 26, 2005 8:20 AM
> To: Cisco certification
> Subject: Different Command Format on BGP routing process
>
> Hi Group,
>
> There is any different result if I use the following to enable BGP ?
>
> Router(config)# router bgp 65412
> Router(config-router)# neighbor 192.168.0.1 remote-as 65412
> Router(config-router)# neighbor 192.168.0.1 ebgp-multihop 255
>
> Router(config)# router bgp 65412
> Router(config-router)# neighbor 192.168.0.1 remote-as 65412
> Router(config-router)# address-family ipv4 Router(config-router-af)#
> neighbor 192.168.0.1 activate Router(config-router-af)# neighbor
> 192.168.0.1 ebgp-multihop 255
>
>
> I found something very interesting. the command "neighbor 192.168.0.1
> next-hop-unchanged" will never display in the first format but it takes
> effect when I use some show command. I'm afraid that if I write erase
> the configuration and paste the configuration again, it will miss this
> command. Any have this experience before ?
>
> Thanks !
> Ryan
>
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