Path: utzoo!mnetor!tmsoft!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!usenet.ins.cwru.edu!slc6!lim From: lim@slc6.INS.CWRU.Edu (Hock-Koon Lim) Newsgroups: comp.protocols.tcp-ip Subject: MacTCP.... Message-ID: <1990Dec28.210454.10935@usenet.ins.cwru.edu> Date: 28 Dec 90 21:04:54 GMT Sender: news@usenet.ins.cwru.edu Organization: Case Western Reserve Univ. Cleveland, Ohio, (USA) Lines: 72 Nntp-Posting-Host: slc6.ins.cwru.edu I have came across some problems running MacTCP v1.1. The Mac is connected to the campus ethernet with an ethernet Interface. MacTCP is install for application like Stanford Mac/IP V4.0. The address assignment for the Mac is provided by a bootp server running CMU`s bootpd. The MacTCP is configured to get the address from "server". When I start the Mac/IP, the mac send out the BOOTP Request to the network. It received a BOOTP Reply from the server. In the reply packet, it get its IP address and the Gateway address which is set to the Bootp server address(this work find if the Mac is on the LocalTalk but not on the ethernet). I have to enter the default gatway address in the MacTCP configuration. After the Mac get the BOOTP Reply, it will send out an ICMP C Get address mask packet. This packet will cause some problem on the network. Now all the IP hosts on the network will try to reply the Address mask request. If the Mac is not in the IP hosts ARP table, they will also send an ARP request packet packet for this mac. Every IP hosts will send the ICMP R Address mask = [255.255.0.0] to this poor Mac. So my question is why the Mac has to send out the Get address mask packet? Is they any MacTCP configuration I did wrong to cause this problem? The following is the Caputure file from the sniffer which so this problem. Thanks, Hock-Koon Lim, Information Network services Case Western Reserve University; Cleveland, Ohio, USA 44106 (216) 368-2982 lim@ins.cwru.edu ----------------------------------------------------------------- Sniffer Network Analyzer data from 27-Dec-90 at 10:51:42, file C:\CAPTURE\MACTCP.ENC, Page 1 SUMMARY Delta T Destination Source Summary 42 3.9915 Broadcast Mac-Test BOOTP Request 43 0.0084 Mac-Test U-B 030A36 BOOTP Reply 44 0.0012 Broadcast Mac-Test ICMP C Get address mask 45 0.0004 Mac-Test Sun 09FA67 ICMP R Address mask = [255.255.0.0] 46 0.0004 Mac-Test Sun 02A20E ICMP R Address mask = [255.255.0.0] 47 0.0001 Mac-Test Sun 02AB5C ICMP R Address mask = [255.255.0.0] 48 0.0004 Mac-Test Sun 02A2AF ICMP R Address mask = [255.255.0.0] 49 0.0003 Mac-Test Sun 02A1D9 ICMP R Address mask = [255.255.0.0] 50 0.0004 Mac-Test U-B 03091E ICMP R Address mask = [255.255.0.0] 51 0.0003 Mac-Test U-B 030A2B ICMP R Address mask = [255.255.0.0] 52 0.0005 Mac-Test Sun 0A04F0 ICMP R Address mask = [255.255.0.0] 53 0.0002 Mac-Test Sun 095BBA ICMP R Address mask = [255.255.0.0] 54 0.0005 Mac-Test Sun 095BCD ICMP R Address mask = [255.255.0.0] 55 0.0002 Mac-Test Sun 02974C ICMP R Address mask = [255.255.0.0] 56 0.0005 Mac-Test DEC 1AFD82 ICMP R Address mask = [255.255.0.0] 57 0.0003 Mac-Test U-B 030AB2 ICMP R Address mask = [255.255.0.0] 58 0.0006 Mac-Test U-B 0308D6 ICMP R Address mask = [255.255.0.0] delete a lot of ICMP reply for Address mask here 189 0.0001 Broadcast DECnet000BA4 ARP C PA=[129.22.8.87] PRO=IP 204 0.0002 Broadcast DECnet000BA4 ARP C PA=[129.22.8.87] PRO=IP 205 0.0001 Broadcast DECnet000BA4 ARP C PA=[129.22.8.87] PRO=IP 206 0.0002 DECnet000BA4 Mac-Test ARP R PA=[129.22.8.87] HA=00001D00DB99 PRO=IP 207 0.0029 Broadcast Mac-Test ARP C PA=[129.22.8.87] PRO=IP 208 0.0004 Mac-Test Sun 02A0C5 ICMP R Address mask = [255.255.0.0] 209 0.0011 Mac-Test DECnet000BA4 ICMP R Address mask = [255.255.0.0] 210 0.0019 Mac-Test DECnet002FA4 ICMP R Address mask = [255.255.0.0] -- Hock-Koon Lim, Information Network services Case Western Reserve University; Cleveland, Ohio, USA 44106 (216) 368-2982 lim@ins.cwru.edu