Group - At last a question I can answer! You can 1.) Build a custom db9 adapter that raises CD toward the 2800 and does the null-modem functions, or 2.) force an arp entry into a router on the same Ethernet segment. To get access I used method #2 which is described in the attached text file. Later I built the adapter which I still have. If you need the pin out: rj45 - db9 1 8 2 1,6 3 2 4 5 5 5 6 3 7 4 8 7 happy hacking Buddy Venne, CCNP, CCIE written, MCSE WAN/LAN Specialist Onyx Acceptance (949) 465-3775 -----Original Message----- From: Clay Stuckey [mailto:[EMAIL PROTECTED]] Sent: Wednesday, August 30, 2000 8:38 PM To: group study Subject: Can't connect to a Cisco/Grand Junction 2800 Switch via serial I have tried several serial cables. I can connect to other cisco equipment fine. My terminal program says it is connected but no response from key strokes. I move the cable to a router and hit enter and I get a login. I move it back to the switch and nada!!!! Any ideas. I did try a null modem cable and at least got one wierd ATxxx thingy in the screen. When I go back to a standard serial cable - nothing. I would love any advice. Clay ___________________________________ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Journal entry October 9, 1999: The problem: Catalyst 2800 and we can't access the cli. We don't know the MAC, or the ip it used to have. Console port communicates but does not seem to be of use. It sends AT command strings which would be to configure a modem if one was on there. no menu prompts. I got on to the 1605 that is on the same ethernet segment as one of the switch ports. I tried a ping 255.255.255.255 and then look at the arp table, but no luck I tried to get the serial port running, but no luck I got 2 modems back to back, a sportster on the switch and a courier on the attacker I used &c0 to tell the modem to ignore CD, and &d0 to ignore DTR, that way I can plug and unpluig I used one terminal and ste it all up. I kept moving the terminal from the sportster to the courier I set the courier to go into "Originate mode from the front switch. I plugged into the sport and issued ata to start answering I plugged the sport to the switch and then put the terminal cable in the courier, and as I was doing that I pressed the front switch and it went into training. this was all for nought, because the serial port was not responding to my a enter, b enter, c enter, d. . . . on through h or so. I did not get as far as M, which may have been the one that would have worked. but anyway at labb I got into config t mode and tried to add an arp entry with arp 2.2.2.2 00c0.id80.29ac arpa ethernet 0 adn the same alias at the end no luck because the router said invalid arp command, must be bridging. I tried several modes of bridge group 1 which enables it and then go to the interface and issue ip bridge-group 1 and other commands, but these did not work. I then thought, why not add an address that would be valid if there was a lan on E0? so I gave it 219.17.100.5, and put that in an arp command. still error. Then I went to global conmfig mode and issued ip host-routing and then tried to add the arp entry, and it worked. then I pinged and it worked and then I did telnet and it worked. voila! menus and such. I could not find a place to set a fixed ip address. but in VLAN 1 we put 219.17.100.5 255.255.255.0 and this may be where it is put in. It is not clear. I felt good. * for a textbook description of the procedures used, see ref. 1. For a general overview, see #2. 1. Hunt, Craig. TCP/IP Network Administration. 2d ed. Sebastopol, CA: O'Reilly & Associates,1998. 2. NAF Personnel. NAF Notes, Network Analysis Forum - 1997. Groveland, CA: Pine Mountain Group.
