Re: [lwip-users] ppp-new IP forwarding only works one direction (Ethernet to PPP)

[Sylvain Rochet]

Hello Charles,


On Mon, Apr 14, 2014 at 01:05:07PM +0000, address@hidden wrote:
> Hi Sylvain,
> 
> I applied the patch and it seems everything is working. However, I 
> don't know much about VJ support, so I don't know if the PPP server 
> and my gateway device have actually negotiated to use VJ at all. 
> Please tell me how to check VJ is in effect. Is there any specific 
> debug options for VJ ?

pppd negotiate VJ by default unless novj option is set.

pppd debug display the VJ negotiation, for example:

Apr 12 01:55:14 ornithopter pppd[990]: rcvd [IPCP ConfAck id=0x1 <compress VJ 
0f 01> <addr 192.168.2.1>]
Apr 12 01:55:14 ornithopter pppd[990]: sent [IPCP ConfAck id=0x2 <compress VJ 
0f 01> <addr 192.168.2.2> <ms-dns1 198.168.100.7> <ms-dns2 198.168.100.7>]


> I did set VJ_SUPPORT to 1 in lwipopts.h, is there anything else need 
> be set up?

That should be enough, as long as your PPP server accept VJ.


Sylvain

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