Thanks Waris (It is for ME3600 + ASR1K)

From: [email protected]
To: [email protected]; [email protected]; [email protected]; 
[email protected]
Subject: Re: [c-nsp] next-hop-self under address-family vpnv4 also?
Date: Mon, 22 Sep 2014 02:27:42 +0000








BGP PIC Edge would be recommended but if it is not supported, use different RDs 
even for the same VPN. This would allow second best path to be installed for 
the same prefix.







Best Regards,











Waris Sagheer

Technical Marketing Manager

Service Provider Access Group (SPAG)

[email protected]

Phone: +1 408 853 6682

Mobile: +1 408 835 1389



CCIE - 19901
















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From: CiscoNSP List <[email protected]>

Date: Friday, September 19, 2014 at 3:23 PM

To: adam vitkovsky <[email protected]>, Will Tardy 
<[email protected]>, "[email protected]"
 <[email protected]>

Subject: Re: [c-nsp] next-hop-self under address-family vpnv4 also?







Thanks very much Adam.




From: [email protected]
To: [email protected];
[email protected]; 
[email protected]
Subject: RE: [c-nsp] next-hop-self under address-family vpnv4 also?
Date: Fri, 19 Sep 2014 07:50:04 +0000

Next-hop-self is enabled automatically under vpnvX AF. 

If the code supports it I'd recommend:

address-family vpnv4
   bgp advertise-best-external  <-- enables best-external + pic(if supported).

   no bgp recursion host <--disables recursive lookup for BGP NHs. 
   bgp nexthop route-map BGP_NHT <--specifies which prefixes qualify as BGP NHs.

   bgp nexthop trigger delay 0 <--allows BGP to act on IGP events 
immediately(enable if FRR backup is available for the BGP NH).


route-map BGP_NHT permit 10 
  match ip address prefix-list PE_LOOPBACKS
  match source-protocol "igp" <--if you are using hierarchical MPLS you need to 
add BGP there as well.
route-map BGP_NHT permit 20
  match source-protocol connected


adam
> -----Original Message-----
> From: cisco-nsp [mailto:[email protected]] On Behalf Of
> CiscoNSP List
> Sent: Friday, September 19, 2014 3:32 AM
> To: Will Tardy; [email protected]
> Subject: Re: [c-nsp] next-hop-self under address-family vpnv4 also?
> 
> Cheers.
> 
> Any other "tweaks" to default config you recommend?  i.e. timers etc?
> 
> 
> > From: [email protected]
> > To: [email protected]
> > Date: Fri, 19 Sep 2014 00:42:23 +0000
> > Subject: Re: [c-nsp] next-hop-self under address-family vpnv4 also?
> >
> > It¹s not needed.
> >
> >
> > "address-family vpnv4" section is used to define which routers
> > participate in the VPNv4.  The underlying MPLS network will forward
> > labels between the
> > VPNv4 end-point CE's. Next-hop-self isn¹t required. All that¹s
> > required is MPLS and IGP reachability between the CE¹s participating
> > in the vpnv4 domain.
> >
> > On 19/09/2014 10:31 am, "CiscoNSP List" <[email protected]>
> wrote:
> >
> > >Is it recommended to add it under vpnv4 also?
> > >
> > >i.e.
> > >
> > >router bgp xxxxxx
> > >...
> > >neighbor iBGP-IPv4-PEERS update-source Loopback0 neighbor
> > >iBGP-IPv4-PEERS next-hop-self neighbor xxx.xxx.xxx.xxx peer-group
> > >iBGP-IPv4-PEERS...
> > >address-family vpnv4
> > >  bgp redistribute-internal
> > >  neighbor  iBGP-IPv4-PEERS send-community extended
> > >  neighbor iBGP-IPv4-PEERS next-hop-self
> > >  neighbor xxx.xxx.xxx.xxx activate
> > >
> > >Cheers.
> > >
> > >
> > >
> > >_______________________________________________
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> >
> >
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