Thanks Gaz, Let me know, as I could benefit from that info when I add a third 3548 to the stack. I would hate to introduce half-duplex back into my full-duplex network (except for some of the printers...).
Ole ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Ole Drews Jensen Systems Network Manager CCNP, MCSE, MCP+I RWR Enterprises, Inc. [EMAIL PROTECTED] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ http://www.RouterChief.com ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Need a Job? http://www.OleDrews.com/job ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -----Original Message----- From: Gaz [mailto:[EMAIL PROTECTED]] Sent: Thursday, March 21, 2002 1:01 PM To: [EMAIL PROTECTED] Subject: Re: Gigastack Etherchannel [7:39033] Ole, Good question.......... Dunno! I was just going to suggest that one 3548 could only talk to one other switch at full duplex. The Gigastack bus may equate to a shared media once another switch is attached, so needs to go to half duplex. This must be different for something like a 3508, as a 3508 can definitely take multiple full duplex connections when used as the hub of a star configuration. In fact now I've finished writing it, it seems reasonable. I will test this tomorrow as well. Anybody pick holes in that theory? Gaz ""Ole Drews Jensen"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > If you have three 3548's - A, B and C, and you have 1 GigaStack module in A > where only one connector is connected to one connector on a GigaStack module > in B, and 1 GigaStack module in C where only one connected is connected to > one connector on a second GigaStack module in B. Would that make a Full > Duplex on the connections since only one port is used on each GigaStack > module, or would it end up in Half Duplex anyway, since you have a total of > three switches? > > Ole > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > Ole Drews Jensen > Systems Network Manager > CCNP, MCSE, MCP+I > RWR Enterprises, Inc. > [EMAIL PROTECTED] > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > http://www.RouterChief.com > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > Need a Job? > http://www.OleDrews.com/job > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > > > > -----Original Message----- > From: Georgescu, Aurelian [mailto:[EMAIL PROTECTED]] > Sent: Thursday, March 21, 2002 11:56 AM > To: [EMAIL PROTECTED] > Subject: RE: Gigastack Etherchannel [7:39033] > > > They can be used in full-duplex mode on point-to-point links (aka using only > one connector on each GigaStack, one at each end of the cable). If you > daisy-chain them they default to half-duplex. > > Aurelian > > -----Original Message----- > From: Ole Drews Jensen [mailto:[EMAIL PROTECTED]] > Sent: Thursday, March 21, 2002 12:02 PM > To: [EMAIL PROTECTED] > Subject: RE: Gigastack Etherchannel [7:39033] > > GigaStack GBIC's are Full Duplex: > > ELVIS#show int gigabitEthernet 0/1 > GigabitEthernet0/1 is up, line protocol is up > Hardware is Gigabit Ethernet, address is 0002.fd13.52f1 (bia > 0002.fd13.52f1) > MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, > reliability 255/255, txload 1/255, rxload 1/255 > Encapsulation ARPA, loopback not set > Keepalive not set > Auto-duplex (Full), link type is autonegotiation, media type is > CX_GIGASTACK > output flow-control is off, input flow-control is off > ARP type: ARPA, ARP Timeout 04:00:00 > GigaStack module(0.2) in GBIC slot. link1 is up, link2 is down > Last input 00:00:06, output 00:00:01, output hang never > Last clearing of "show interface" counters 11w1d > Queueing strategy: fifo > Output queue 0/40, 0 drops; input queue 0/75, 0 drops > 5 minute input rate 107000 bits/sec, 15 packets/sec > 5 minute output rate 91000 bits/sec, 16 packets/sec > 122086095 packets input, 1719966070 bytes, 0 no buffer > Received 3149732 broadcasts, 0 runts, 0 giants, 0 throttles > 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored > 0 watchdog, 163799 multicast, 0 pause input > 165588418 packets output, 149633091 bytes, 0 underruns > 0 output errors, 0 collisions, 0 interface resets > 0 babbles, 0 late collision, 0 deferred > 0 lost carrier, 0 no carrier, 0 pause output > 0 output buffer failures, 0 output buffers swapped out > > Hth, > > Ole > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > Ole Drews Jensen > Systems Network Manager > CCNP, MCSE, MCP+I > RWR Enterprises, Inc. > [EMAIL PROTECTED] > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > http://www.RouterChief.com > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > Need a Job? > http://www.OleDrews.com/job > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > > > > -----Original Message----- > From: Jeffrey Reed [mailto:[EMAIL PROTECTED]] > Sent: Thursday, March 21, 2002 10:22 AM > To: [EMAIL PROTECTED] > Subject: RE: Gigastack Etherchannel [7:39033] > > > I'm not sure, but I thought I read somewhere that the GigaStack GBICs are > half duplex. I think I read somewhere that you shouldn't use them in an > environment that requires QOS. If this is true, your throughput would be > better with 1000B-T GBICs or Fiber GBICs running at full duplex. > > Jeffrey Reed > Classic Networking, Inc. > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Gaz > Sent: Thursday, March 21, 2002 10:16 AM > To: [EMAIL PROTECTED] > Subject: Gigastack Etherchannel [7:39033] > > Hi all, > > Been searching all over CCO for this info....anybody know for sure? > > > Using Gigastack, can both slots be used as "Gigastack Etherchannel" (ie all > four ports (two on each module)) to provide 4Gb link. > > Scenario would be a 3508 with two Gigastack modules and 3548 with two > Gigastack modules - connected with four gigastack cables. > Various web pages show 2Gb full duplex using Gigastack and also mention 4Gb > Full Duplex using Gigabit Ethernet. Even though the latter was on a > Gigastack data sheet, it was worded as though (or could mean) an alternative > was to use Gigabit Ethernet at 4Gb. > > Hopefully I've got the question over - Basically, I know 4Gb is possible > with fibre SX/LX etc, but what about Gigastack? > > Thanks, > > Gaz Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=39077&t=39033 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
