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[5.0_RC3] pppd: Couldn't add proxy arp entry: Invalid argument



In NetBSD 5.0_RC3/amd64, trying to have pppd set a proxy arp entry for the remote IP address fails with "Couldn't add proxy arp entry: Invalid argument". Other than that, the ppp session works fine.

The same configuration of pptp/pppd works under NetBSD 4.0/i386, so I cannot tell if this is a 4.0-->5.0 or i386-->amd64 problem.

Looking at the code (src/usr.sbin/pppd/pppd/sys-bsd.c:1600ff), I see lots of changes from the 4.0 code but no obvious causes.

pptpd/pppd log:
Mar 30 16:32:48 wotan pptpd[17724]: CTRL: Client 10.99.1.69 control connection started Mar 30 16:32:48 wotan pptpd[17724]: CTRL: Starting call (launching pppd, opening GRE)
Mar 30 16:32:48 wotan pppd[5277]: pppd 2.4.4 started by andreas, uid 0
Mar 30 16:32:48 wotan pppd[5277]: Using interface ppp0
Mar 30 16:32:48 wotan pppd[5277]: Connect: ppp0 <--> /dev/pts/7
Mar 30 16:32:51 wotan pppd[5277]: Unsupported protocol 'Apple Client Server Protocol Control' (0x8235) received
Mar 30 16:32:51 wotan pppd[5277]: found interface sk0 for proxy arp
Mar 30 16:32:51 wotan pppd[5277]: Couldn't add proxy arp entry: Invalid argument
Mar 30 16:32:51 wotan pppd[5277]: local  IP address 192.168.0.1
Mar 30 16:32:51 wotan pppd[5277]: remote IP address 10.99.3.16


--
    aew



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