Re: Send-label

For end to end LSP path.....i am not allowed to run mpls bw the edge
routers of SPs.....but still need to carry the labels for the MBGP
next hop to maintain end to end LSP path.....

On Mon, Jul 27, 2009 at 4:23 AM, Rana Bilal<rab_91_at_hotmail.com> wrote:
> Jack....Sorry for the delay response........well here is the answer..
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> Send Label command is mostly used in the inter-AS mpls vpns between the ASBRs of different SPs.
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> This is basically comes under the Option C of the Inter-AS vpns according to Cisco.
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> This is the option when you are not allowed to use address family VPV4 between the ASBRs, so your BGP is taking care of sending the labels accross the different AS. However your RRs in the two AS will take care of the VPNV4 bgp routes by running eBGP multihop in VPNV4 address family.
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> In option C you can do the following:
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> Eliminates LFIB duplication at ASBRS .
> ASBRs don't hold VPNv4 prefix/label info.
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> ASBRs Exchange PE loopbacks (IPv4) with labels as these are BGP NH addresses
> Two Options for Label Distribution for BGP NH Addresses:
> IGP + LDP OR eBGP IPv4 + Labels (RFC3107)
> BGP exchange Label Advertisement Capability Enables end-end LSP Paths
> Subsequent Address Family Identifier (value 4) field is used to indicate that the
> NLRI contains a label
> Disable Next-hop-self on RRs
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> Thanks,
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> Ahmad Bilal
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>> Date: Wed, 22 Jul 2009 14:51:03 +0530
>> Subject: Send-label
>> From: jckdaniels12_at_gmail.com
>> To: ccielab_at_groupstudy.com
>>
>> Hi All,
>>
>> i have doubt in Inter AS VPN -
>> why do we need to give command neighbour send-label
>>
>> Thanks and regards
>>
>>
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Received on Mon Jul 27 2009 - 11:45:11 ART