2.1.1[09,10,11p] ppp/tcpdump problem

Pete Clements (clem@clem.digital.net)
Fri, 24 Jul 1998 10:40:49 -0400 (EDT)

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Starting with pre-109 kernels, tcpdump of the ppp link gives thrash for the
inbound packets. The ppp link itself and the data appears fine other than the
tcpdump indications. Have been running the ppp link since changes introducted
in pre-109, currently running 111-pre1. (running diald)

-- 
Pete Clements 
clem@clem.digital.net

tcpdump data and .config

**********tcpdump -i ppp0

10:18:14.697210 204.215.239.74 > 18.86.0.44: icmp: echo request (ttl 63, id 8178)
10:18:14.987129 238.1.211.69 > 18.86.0.44: (frag 17664:-27@672) [tos 0x3] (ttl 42, bad cksum 0!, optlen=40[|ip])
10:18:15.696931 204.215.239.74 > 18.86.0.44: icmp: echo request (ttl 63, id 8179)
10:18:16.006844 238.1.210.126 > 18.86.0.44: (frag 17664:-27@672) [tos 0x3] (ttl 43, bad cksum 0!, optlen=40[|ip])
10:18:16.696651 204.215.239.74 > 18.86.0.44: icmp: echo request (ttl 63, id 8180)
10:18:16.966576 238.1.209.200 > 18.86.0.44: (frag 17664:-27@672) [tos 0x3] (ttl 44, bad cksum 0!, optlen=40[|ip])
10:18:17.696378 204.215.239.74 > 18.86.0.44: icmp: echo request (ttl 63, id 8181)
10:18:17.986299 238.1.208.195 > 18.86.0.44: (frag 17664:-27@672) [tos 0x3] (ttl 45, bad cksum 0!, optlen=40[|ip])

**********tcpdump -i eth0 same box as ppp0

10:18:14.697210 204.215.239.74 > 18.86.0.44: icmp: echo request (ttl 63, id 8178)
10:18:14.987129 18.86.0.44 > 204.215.239.74: icmp: echo reply (ttl 238, id 10943)
10:18:15.696931 204.215.239.74 > 18.86.0.44: icmp: echo request (ttl 63, id 8179)
10:18:16.006844 18.86.0.44 > 204.215.239.74: icmp: echo reply (ttl 238, id 11142)
10:18:16.696651 204.215.239.74 > 18.86.0.44: icmp: echo request (ttl 63, id 8180)
10:18:16.966576 18.86.0.44 > 204.215.239.74: icmp: echo reply (ttl 238, id 11324)
10:18:17.696378 204.215.239.74 > 18.86.0.44: icmp: echo request (ttl 63, id 8181)
10:18:17.986299 18.86.0.44 > 204.215.239.74: icmp: echo reply (ttl 238, id 11585)

***********tcpdump -i eth0 on 204.215.239.74 box running 2.1.110


10:18:14.197773 204.215.239.74 > 18.86.0.44: icmp: echo request (ttl 64, id 8178)
10:18:14.482753 18.86.0.44 > 204.215.239.74: icmp: echo reply (ttl 238, id 10943)
10:18:15.194486 204.215.239.74 > 18.86.0.44: icmp: echo request (ttl 64, id 8179)
10:18:15.502252 18.86.0.44 > 204.215.239.74: icmp: echo reply (ttl 238, id 11142)
10:18:16.194481 204.215.239.74 > 18.86.0.44: icmp: echo request (ttl 64, id 8180)
10:18:16.462357 18.86.0.44 > 204.215.239.74: icmp: echo reply (ttl 238, id 11324)
10:18:17.194481 204.215.239.74 > 18.86.0.44: icmp: echo request (ttl 64, id 8181)
10:18:17.481516 18.86.0.44 > 204.215.239.74: icmp: echo reply (ttl 238, id 11585)


*********.config 

CONFIG_EXPERIMENTAL=y
CONFIG_M486=y
CONFIG_MODULES=y
CONFIG_NET=y
CONFIG_SYSVIPC=y
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_SYSCTL=y
CONFIG_BINFMT_AOUT=y
CONFIG_BINFMT_ELF=y
CONFIG_PARPORT=y
CONFIG_PARPORT_PC=y
CONFIG_BLK_DEV_FD=y
CONFIG_BLK_DEV_IDE=y
CONFIG_BLK_DEV_IDEDISK=y
CONFIG_PARIDE_PARPORT=y
CONFIG_PACKET=y
CONFIG_NETLINK=y
CONFIG_RTNETLINK=y
CONFIG_NETLINK_DEV=y
CONFIG_FIREWALL=y
CONFIG_NET_ALIAS=y
CONFIG_UNIX=y
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
CONFIG_IP_ADVANCED_ROUTER=y
CONFIG_RTNETLINK=y
CONFIG_NETLINK=y
CONFIG_IP_MULTIPLE_TABLES=y
CONFIG_IP_ROUTE_VERBOSE=y
CONFIG_IP_FIREWALL=y
CONFIG_IP_FIREWALL_NETLINK=y
CONFIG_NETLINK_DEV=y
CONFIG_IP_ALIAS=y
CONFIG_IP_NOSR=y
CONFIG_NETDEVICES=y
CONFIG_NET_ETHERNET=y
CONFIG_NET_VENDOR_3COM=y
CONFIG_EL3=y
CONFIG_PPP=y
CONFIG_SLIP=y
CONFIG_MINIX_FS=y
CONFIG_EXT2_FS=y
CONFIG_FAT_FS=y
CONFIG_MSDOS_FS=y
CONFIG_PROC_FS=y
CONFIG_NFS_FS=y
CONFIG_SUNRPC=y
CONFIG_LOCKD=y
CONFIG_SMB_FS=y
CONFIG_SMB_WIN95=y
CONFIG_NLS=y
CONFIG_NLS_CODEPAGE_437=y
CONFIG_VT=y
CONFIG_VT_CONSOLE=y
CONFIG_SERIAL=y
CONFIG_PRINTER=y
CONFIG_MOUSE=y
CONFIG_PSMOUSE=y
CONFIG_FT_NORMAL_DEBUG=y
CONFIG_FT_STD_FDC=y
CONFIG_VGA_CONSOLE=y

CONFIG_FTAPE=m
CONFIG_ZFTAPE=m
CONFIG_ZFT_COMPRESSOR=m

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Next message: Les Schaffer: "Re: kmod, fork errors, net-pf-5 -- 2.1.89++"
Previous message: Scott Smyth: "Block/Page caching of files: how to find what to cache?"