Re: kern/51531: Recent networking regression affecting installs

[Andreas Gustafsson <gson%gson.org@localhost>]

The following reply was made to PR kern/51531; it has been noted by GNATS.

From: Andreas Gustafsson <gson%gson.org@localhost>
To: Roy Marples <roy%marples.name@localhost>
Cc: gnats-bugs%netbsd.org@localhost
Subject: Re: kern/51531: Recent networking regression affecting installs
Date: Wed, 23 Nov 2016 17:16:06 +0200

 Roy,
 
 I took packet captures on the server (10.169.0.1) of a successful
 network install (source date 2016.09.16.10.54.45) and an unsuccessful
 one (sorce date 2016.11.22.12.04.35).  Maybe you can glean some
 useful information from them.
 
 Here are extracts showing the last couple of packets of the TFTP boot
 followed by the DAD, ping test, and first couple of packets of the HTTP
 set download (if present).   The successful one looks like this:
 
   16:42:58.073675 00:50:fc:fb:10:45 (oui Unknown) > 00:1b:fc:9e:0f:b4 (oui Unknown), ethertype IPv4 (0x0800), length 558: 10.169.0.1.62529 > 10.169.0.2.dict-lookup: UDP, length 516
   16:42:58.087396 00:1b:fc:9e:0f:b4 (oui Unknown) > 00:50:fc:fb:10:45 (oui Unknown), ethertype IPv4 (0x0800), length 60: 10.169.0.2.dict-lookup > 10.169.0.1.62529: UDP, length 5
   16:44:05.360799 00:1b:fc:9e:0f:b4 (oui Unknown) > Broadcast, ethertype ARP (0x0806), length 60: Request who-has 10.169.0.2 tell 10.169.0.2, length 46
   16:44:13.346801 00:1b:fc:9e:0f:b4 (oui Unknown) > Broadcast, ethertype ARP (0x0806), length 60: Request who-has 10.169.0.1 tell 10.169.0.2, length 46
   16:44:13.346811 00:50:fc:fb:10:45 (oui Unknown) > 00:1b:fc:9e:0f:b4 (oui Unknown), ethertype ARP (0x0806), length 42: Reply 10.169.0.1 is-at 00:50:fc:fb:10:45 (oui Unknown), length 28
   16:44:13.348603 00:1b:fc:9e:0f:b4 (oui Unknown) > 00:50:fc:fb:10:45 (oui Unknown), ethertype IPv4 (0x0800), length 98: 10.169.0.2 > 10.169.0.1: ICMP echo request, id 19520, seq 0, length 64
   16:44:13.348614 00:50:fc:fb:10:45 (oui Unknown) > 00:1b:fc:9e:0f:b4 (oui Unknown), ethertype IPv4 (0x0800), length 98: 10.169.0.1 > 10.169.0.2: ICMP echo reply, id 19520, seq 0, length 64
   16:44:16.479645 00:1b:fc:9e:0f:b4 (oui Unknown) > 00:50:fc:fb:10:45 (oui Unknown), ethertype IPv4 (0x0800), length 98: 10.169.0.2 > 10.0.1.1: ICMP echo request, id 22346, seq 0, length 64
   16:44:16.480349 00:50:fc:fb:10:45 (oui Unknown) > 00:1b:fc:9e:0f:b4 (oui Unknown), ethertype IPv4 (0x0800), length 98: 10.0.1.1 > 10.169.0.2: ICMP echo reply, id 22346, seq 0, length 64
   16:44:19.104649 00:1b:fc:9e:0f:b4 (oui Unknown) > 00:50:fc:fb:10:45 (oui Unknown), ethertype IPv4 (0x0800), length 78: 10.169.0.2.65535 > 10.169.0.1.http: Flags [S], seq 2279312074, win 32768, options [mss 1460,nop,wscale 3,sackOK,nop,nop,nop,nop,TS val 1 ecr 0], length 0
   16:44:19.104665 00:50:fc:fb:10:45 (oui Unknown) > 00:1b:fc:9e:0f:b4 (oui Unknown), ethertype IPv4 (0x0800), length 78: 10.169.0.1.http > 10.169.0.2.65535: Flags [S.], seq 241726766, ack 2279312075, win 32768, options [mss 1460,nop,wscale 3,nop,nop,TS val 1 ecr 1,sackOK,nop,nop], length 0
   (successful HTTP download follows)
 
 The unsuccssful one looks like this:
 
   21:02:02.196177 00:50:fc:fb:10:45 (oui Unknown) > 00:1b:fc:9e:0f:b4 (oui Unknown), ethertype IPv4 (0x0800), length 558: 10.169.0.1.62681 > 10.169.0.2.netadmin: UDP, length 516
   21:02:02.210352 00:1b:fc:9e:0f:b4 (oui Unknown) > 00:50:fc:fb:10:45 (oui Unknown), ethertype IPv4 (0x0800), length 60: 10.169.0.2.netadmin > 10.169.0.1.62681: UDP, length 5
   21:04:44.366636 00:1b:fc:9e:0f:b4 (oui Unknown) > Broadcast, ethertype ARP (0x0806), length 60: Request who-has 10.169.0.2 tell 0.0.0.0, length 46
   21:04:44.939141 00:1b:fc:9e:0f:b4 (oui Unknown) > 33:33:ff:9e:0f:b4 (oui Unknown), ethertype IPv6 (0x86dd), length 78: :: > ff02::1:ff9e:fb4: ICMP6, neighbor solicitation, who has fe80::21b:fcff:fe9e:fb4, length 24
   21:04:45.772737 00:1b:fc:9e:0f:b4 (oui Unknown) > Broadcast, ethertype ARP (0x0806), length 60: Request who-has 10.169.0.2 tell 0.0.0.0, length 46
   21:04:47.670958 00:1b:fc:9e:0f:b4 (oui Unknown) > Broadcast, ethertype ARP (0x0806), length 60: Request who-has 10.169.0.2 tell 0.0.0.0, length 46
   21:04:49.679675 00:1b:fc:9e:0f:b4 (oui Unknown) > Broadcast, ethertype ARP (0x0806), length 60: Request who-has 10.169.0.2 tell 10.169.0.2, length 46
   21:04:51.688397 00:1b:fc:9e:0f:b4 (oui Unknown) > Broadcast, ethertype ARP (0x0806), length 60: Request who-has 10.169.0.2 tell 10.169.0.2, length 46
   (no further packets)
 
 -- 
 Andreas Gustafsson, gson%gson.org@localhost