The answer is yes. The FD/HD issue isn't switch port dependent but GBIC port dependent. If you're only using a single Gigastack port, even if you have 2 Gigastack GBICs in the same switch, then the GBIC will set up a FD connection both upstream and downstream.
Rik -----Original Message----- From: Ole Drews Jensen [mailto:[EMAIL PROTECTED]] Sent: Monday, March 25, 2002 8:43 PM To: 'Rik Guyler'; [EMAIL PROTECTED] Subject: RE: Gigastack Etherchannel [7:39033] Hi Rik, You're correct, and if you continue to read the rest of the e-mails regarding this question, another question pop's up - what if only one port on each module is used, and instead two modules are installed in each switch - would that allow a stack > 2 in full duplex? 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: Rik Guyler [mailto:[EMAIL PROTECTED]] Sent: Monday, March 25, 2002 6:50 PM To: [EMAIL PROTECTED] Subject: RE: Gigastack Etherchannel [7:39033] Yes and no. Gigastacks are FD when only one port is used. When you truly "stack" with these GBICs, meaning one port is used for inbound and the other for outbound, a "show int" will reveal a HD connection. As you notice in ole's output, only one port is in use. GigaStack module(0.2) in GBIC slot. link1 is up, link2 is down Rik -----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=39508&t=39033 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
