Cisco and Unix don't use ping for traceroute.
Like Microsoft, Cisco and Unix depend on intermediate routers to decrement
the TTL and send ICMP TTL Exceeded. But unlike Microsoft, Cisco and Unix
send a UDP frame to a high UDP port, starting with 33434. They rely on the
end station sending an ICMP Destination Unreachable/Port Unreachable, which
doesn't always work because some end stations don't send it.
Priscilla
At 06:34 PM 1/16/01, J Roysdon wrote:
>traceroute is just a hack using ping and incrementing TTL to force ttl
>timeouts.
>
>--
>Jason Roysdon, CCNP/CCDP, MCSE, CNA, Network+, A+
>List email: [EMAIL PROTECTED]
>Homepage: http://jason.artoo.net/
>Cisco resources: http://r2cisco.artoo.net/
>
>
>""Tony van Ree"" <[EMAIL PROTECTED]> wrote in message
>[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > Hi,
> >
> > The printer needs to understand the traceroute packet if not it won't
>respond. Ping works because the printer understands the ping command and
>sends an echo back.
> >
> > Just a thought.
> >
> > Teunis,
> > Hobart, Tasmania
> > Australia
> >
> > On Tuesday, January 16, 2001 at 09:20:05 PM, Shane Stockman wrote:
> >
> > > Below is the show ver of the switch
> > >
> > > Cisco Internetwork Operating System Software
> > > IOS (tm) MSFC Software (C6MSFC-IS-M), Version 12.0(7)XE1, EARLY
>DEPLOYMENT
> > > RELEA
> > > SE SOFTWARE (fc1)
> > > TAC:Home:SW:IOS:Specials for info
> > > Copyright (c) 1986-2000 by cisco Systems, Inc.
> > > Compiled Fri 04-Feb-00 00:28 by lstringr
> > > Image text-base: 0x60008900, data-base: 0x60CBC000
> > >
> > > ROM: System Bootstrap, Version 12.0(3)XE, RELEASE SOFTWARE
> > > BOOTFLASH: MSFC Software (C6MSFC-IS-M), Version 12.0(7)XE1, EARLY
>DEPLOYMENT
> > > REL
> > > EASE SOFTWARE (fc1)
> > >
> > > ZA002002 uptime is 6 weeks, 3 days, 7 hours, 17 minutes
> > > System returned to ROM by power-on
> > > Running default software
> > >
> > > cisco Cat6k-MSFC (R5000) processor with 122880K/8192K bytes of memory.
> > > Processor board ID SAD0408037F
> > > R5000 CPU at 200Mhz, Implementation 35, Rev 2.1, 512KB L2 Cache
> > > Last reset from power-on
> > > Bridging software.
> > > X.25 software, Version 3.0.0.
> > > 16 Virtual Ethernet/IEEE 802.3 interface(s)
> > > 123K bytes of non-volatile configuration memory.
> > > 4096K bytes of packet SRAM memory.
> > > 16384K bytes of Flash internal SIMM (Sector size 256K).
> > > Configuration register is 0x102
> > >
> > >
> > > My problem is that when I try to tracroute to a printer on a vlan it
>just
> > > gives me the stars , but I can ping quite easily from the same switch.I
>had
> > > a trace done from the mainframe and it stops at this switch and I had
> > > another mainframe trace done from a mainframe in Europe and it still
>stops
> > > at this switch.I can ping the printer address and get a 100% reply from
>both
> > > mainframes.
> > >
> > > Any suggestions ?????
> > >
> > >
> > >
>_________________________________________________________________________
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> > >
> > > _________________________________
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> > >
> >
> >
> > --
> > www.tasmail.com
> >
> >
> > _________________________________
> > FAQ, list archives, and subscription info:
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> >
>
>
>_________________________________
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________________________
Priscilla Oppenheimer
http://www.priscilla.com
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