<html><head><style type="text/css">body {word-wrap: break-word; background-color:#ffffff;}</style></head><body><div style="font-family: sans-serif; font-size: 16px">In this case, the route reflector also has some external peers. So the intent is to set next hop self for just routes learned from those external peers. <br><br>Ben Robinson<br>Systems Engineer<br>LS Networks</div><br><br>-----Original message-----<br><blockquote style="; border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"><div style="font-family: sans-serif; font-size: 14px"><b>From: </b>Bryan <deadheadblues@gmail.com><b><br>To: </b>Ben Robinson <brobinson@lsnetworks.net><b><br>Cc: </b>Stefano Gridelli <sgridelli@gmail.com>, "alcatel-nsp@puck.nether.net" <alcatel-nsp@puck.nether.net><b><br>Sent: </b>Fri, Mar 4, 2011 02:05:53 GMT+00:00<b><br>Subject: </b>Re: [alcatel-nsp] 7750 Route Reflector Server Question<br><br></div><div><meta name="Generator" content="Microsoft Exchange Server">
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<font size="2"><div class="PlainText">I don't think a route reflector is supposed to change next hop. Are<br>
you seeing otherwise?<br>
<br>
On Thu, Mar 3, 2011 at 5:49 PM, Ben Robinson <brobinson@lsnetworks.net> wrote:<br>
> Thanks for the reply. That's not quite what I'm after.<br>
><br>
> In this case, I want to accomplish both on the same internal sessions to<br>
> reflector clients. I want to set next hop self on routes learned from<br>
> external peers and propagate to internal reflector clients. In the same<br>
> internal sessions, I want leave the original IGP next-hop on internal routes<br>
> reflected to the reflector clients.<br>
><br>
> Ben Robinson<br>
> Systems Engineer<br>
> LS Networks<br>
><br>
> -----Original message-----<br>
><br>
> From: Stefano Gridelli <sgridelli@gmail.com><br>
> To: Ben Robinson <brobinson@lsnetworks.net><br>
> Cc: "alcatel-nsp@puck.nether.net" <alcatel-nsp@puck.nether.net><br>
> Sent: Fri, Mar 4, 2011 01:38:04 GMT+00:00<br>
> Subject: Re: [alcatel-nsp] 7750 Route Reflector Server Question<br>
><br>
> You can implement this without a policy but by simply creating two bgp<br>
> groups:<br>
> group internal<br>
> type internal<br>
> neighbor 10.0.0.1<br>
> exit<br>
> exit<br>
> group external<br>
> peer-as 1234;<br>
> neighbor 4.4.4.1;<br>
> exit<br>
> next-hop-self;<br>
> exit<br>
> is this what you are looking for?<br>
> On Thu, Mar 3, 2011 at 7:50 PM, Ben Robinson <brobinson@lsnetworks.net><br>
> wrote:<br>
>><br>
>> Greetings,<br>
>><br>
>><br>
>><br>
>> I’m using route reflection on 7750-SR (8.0R7) and want to set next hop<br>
>> self for routes learned from external BGP peers, but not on routes learned<br>
>> from internal BGP peers. The goal is to reflect routes from internal peers,<br>
>> preserving the IGP next hop while setting next hop self on routes from<br>
>> external peers. Perhaps this is the default behavior.<br>
>><br>
>><br>
>><br>
>> I can set all routes to next hop self in the 7750 Peer/Group configuration<br>
>> and with a policy. Since I don’t want all routes advertised internally by<br>
>> the 7750 to have the next hop self set, I’m assuming that it is accomplished<br>
>> in a policy.<br>
>><br>
>><br>
>><br>
>> Firstly, does anyone know if this is the default behavior? Or, if<br>
>> possible, how to accomplish this with SROS policy.<br>
>><br>
>><br>
>><br>
>> The Juniper policy equivalent is:<br>
>><br>
>><br>
>><br>
>> term external {<br>
>><br>
>> from route-type external;<br>
>><br>
>> then {<br>
>><br>
>> next-hop self;<br>
>><br>
>> accept;<br>
>><br>
>> }<br>
>><br>
>> }<br>
>><br>
>> term internal {<br>
>><br>
>> from route-type internal;<br>
>><br>
>> then accept;<br>
>><br>
>> }<br>
>><br>
>><br>
>><br>
>> …<br>
>><br>
>><br>
>><br>
>> Policy nhs-ipv6:<br>
>><br>
>> Term external:<br>
>><br>
>> from route-type external<br>
>><br>
>> then nexthop self accept<br>
>><br>
>> Term internal:<br>
>><br>
>> from route-type internal<br>
>><br>
>> then accept<br>
>><br>
>><br>
>><br>
>><br>
>><br>
>> Thanks,<br>
>><br>
>><br>
>><br>
>><br>
>><br>
>> Ben Robinson<br>
>><br>
>> Systems Engineer<br>
>><br>
>> LS Networks, Inc.<br>
>><br>
>><br>
><br>
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