From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Greear Date: Thu, 20 Jan 2005 22:19:00 +0000 Subject: Multilink-PPP question. Message-Id: <41F02E54.3040500@candelatech.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ppp@vger.kernel.org Hello! I have been running some tests with multi-link PPP and have some questions... First, I am running one machine on the 2.6.9 kernel one machine, and 2.4.27 on another. Both are using pppd 2.4.1b2, patched to work with Digium T1 cards: http://www.datacanyon.com/pub/telephony/zaptel/misc/ I am using this script to start pppd on each machine, calling it with arguments 'unit 2 1' for one interface, and 'unit 2 25' for the other. #!/bin/sh ARGS="-detach noauth debug 172.100.0.2:172.100.0.1 mp lcp-echo-interval 1 lcp-echo-failure 5 persist holdoff 1 plugin zaptel.so" /usr/sbin/pppd $ARGS $* The other machine has identical arguments, except that the IP addresses are flipped. In general, this is working. I have been seeing an occasional problem when testing link failover. To do this test, I start up a UDP traffic stream across the ppp2 interface (bonded over both T1s for about 2700Kbps throughput). Then, I yank both cables and wait for the ppp2 interface go go away, and plug the cables back in. Normally, the ppp2 interface comes back into existence and I can continue sending traffic over the link... But, sometimes I see this error: sent [LCP EchoRep id=0x2a magic=0xcb4069f5] sent [LCP EchoReq id=0x2b magic=0xcb4069f5] rcvd [LCP ConfReq id=0x28 ] sent [LCP ConfReq id=0x19 ] sent [LCP ConfAck id=0x28 ] rcvd [LCP ConfAck id=0x19 ] sent [LCP EchoReq id=0x0 magic=0xf5f0bc78] Couldn't attach to interface unit 2: Inappropriate ioctl for device Any idea what the problem is? Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com