Re: [mpls-linux-devel] About mpls-packet to ip-packet process

[刘磊 <orp...@ms...>]

I was follow the example of "IPv4 over MPLS: two LER example for mpls-linux-1.95x".
Do you means I have to change the "mpls nhlfe add key 0 instructions nexthop eth3 ipv4 192.168.1.4
(returns key 0x2)" to "mpls nhlfe add key 0 instructions deliver nexthop eth3 ipv4 192.168.1.4
(returns key 0x2)" ?

----------------------------------------
> Date: Wed, 30 Apr 2008 21:16:22 -0500
> From: jl...@mi...
> To: @mindspring.com
> CC: mpl...@li...
> Subject: Re: [mpls-linux-devel] About mpls-packet to ip-packet process
>
> Hmm. I think you are looking at the PHP code. Take a look at
> the 'deliver' instruction. It will show you that packets destined from
> IPv4 may be configured to go through 'ip_rcv' which will result in
> the packet travesing all of the IPv4 netfilter hooks.
>
> On Wed, Apr 30, 2008 at 03:56:51AM +0000, =?GB2312?B?wfXA2iA8b3JwaGVuX2xlaWxpdUBtc24uY29tPg==?= wrote:
>>
>> Hi all:
>> I found that the packet which from ip stack to mpls stack in the ip_finish_output2 had passed POSTROUTING hook in netfilter.
>> BUT the packet from mpls stack to ip stack just use neighbour->output, which NOT hook in PREROUTING in netfilter.
>>
>> In this way, if I do SNAT for ip packet and send into mpls stack, will NOT do Un-SNAT for the reply packet.
>>
>> Is my understand right? How to solved it?
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>
>
> --
> James R. Leu
> jl...@mi...

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