Yes and No. To the original question where only two switches are connected to each other, the connection will be point-to-point, and a Full Duplex will work, just like it does between my two 3548's (where the output in my previous e-mail came from).
If more than two switches are stacked, they will work in Half Duplex. As for the question if you can use two GigaStack Modules and connect both port in both modules so you have 4 connections between the to switches to give you a 4Gbps, I am not sure what the answer is to that. 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: MADMAN [mailto:[EMAIL PROTECTED]] Sent: Thursday, March 21, 2002 12:08 PM To: Ole Drews Jensen Cc: [EMAIL PROTECTED] Subject: Re: Gigastack Etherchannel [7:39033] Not according to this: http://www.cisco.com/univercd/cc/td/doc/product/lan/c2900xl/gbic/ig_gbic/mam oins.htm#xtocid357913 I changed a stack from half to full thinking that made more sense and it took the stack down a while back. Dave Ole Drews Jensen wrote: > > 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 -- David Madland Sr. Network Engineer CCIE# 2016 Qwest Communications Int. Inc. [EMAIL PROTECTED] 612-664-3367 "Emotion should reflect reason not guide it" Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=39058&t=39033 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
