From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Mon Apr 19 2004 - 20:21:06 GMT-3
Kevin,
Try setting both hosts and the GBICs between the switches in the
same access VLAN. This will let you know whether or not it is a
trunking related issue.
HTH,
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987 x 705
Outside US: 775-826-4344 x 705
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Minihane Kevin-kminih01
> Sent: Monday, April 19, 2004 6:01 PM
> To: 'Church, Chuck'
> Cc: 'ccielab@groupstudy.com'
> Subject: RE: Strange trunking issue
>
> I've even tried a different 3550 !....At the moment, I'm running
version
> 12.1(19) on both my 3550's. I've tried ftp'ing between two hosts on
the
> 3550, and it works perfectly.
>
> -----Original Message-----
> From: Church, Chuck [mailto:cchurch@wamnetgov.com]
> Sent: 19 April 2004 23:56
> To: Minihane Kevin-kminih01; Kenneth Wygand; Robert Fischer; MADMAN
> Cc: ccielab@groupstudy.com
> Subject: RE: Strange trunking issue
>
>
> Maybe try a different GBIC port and/or copper port on the 3550? Newer
> code for the 3550?
>
>
> Chuck Church
> Lead Design Engineer
> CCIE #8776, MCNE, MCSE
> Wam!Net Government Services - Design & Implementation Team
> 13665 Dulles Technology Dr. Ste 250
> Herndon, VA 20171
> Office: 703-480-2569
> Cell: 703-819-3495
> cchurch@wamnetgov.com
> PGP key:
>
http://pgp.mit.edu:11371/pks/lookup?op=index&search=cchurch%40wamnetgov.
> com
> -----Original Message-----
> From: Minihane Kevin-kminih01 [mailto:Kevin.Minihane@motorola.com]
> Sent: Monday, April 19, 2004 6:38 PM
> To: 'Kenneth Wygand'; Robert Fischer; Church, Chuck; MADMAN
> Cc: ccielab@groupstudy.com
> Subject: RE: Strange trunking issue
>
> Well, this is really doing my head in now! I've replaced the fibre,
> GBIC's on the 3550. Have changed the encapsulation to ISL (from
dot1q).
> have reversed the fibres, etc. I've just placed hostB onto the 5500
> again, and the ftp takes off like a rocket. I'm beginning to suspect
> the 3550> Has anyone ever seen "slowness" on a device connected to a
> 3550? I'd have thought it would have been ok....
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Minihane Kevin-kminih01
> Sent: 19 April 2004 21:15
> To: 'Kenneth Wygand'; Robert Fischer; Church, Chuck; MADMAN
> Cc: ccielab@groupstudy.com
> Subject: RE: Strange trunking issue
>
>
> Hi
> Sorry for the delay in this. Was sent away with work. I've tried
> swapping the strands around, still no joy. I've used a different
cable,
> and different GBIC's as well in the 3550. I'm going to take Chuck's
> advice, and try changing the encapsulation to ISL, just in case there
is
> some sort of bug causing me to go grey prematurely. I'll let you know
> how that works out. It's 9 pm here in ireland, so I'll try this later
> on tonight and let u all know the result
>
> Thanks for all the help so far!
>
> Kevin
>
> -----Original Message-----
> From: Kenneth Wygand [mailto:KWygand@customonline.com]
> Sent: 16 April 2004 12:46
> To: Minihane Kevin-kminih01; Robert Fischer; Church, Chuck; Minihane
> Kevin-kminih01; MADMAN
> Cc: ccielab@groupstudy.com
> Subject: RE: Strange trunking issue
>
>
> Try swapping the fiber strands on both sides (take the receive port on
> the 5500 and swap it with the transmit port on the 5500, then do the
> same thing on the 3550 side). Then try your transmissions again and
let
> us know.
>
> Good luck,
> Ken
>
> -----Original Message-----
> From: nobody@groupstudy.com on behalf of Minihane Kevin-kminih01
>
> Sent: Fri 4/16/2004 5:13 AM
> To: 'Robert Fischer'; 'Church, Chuck'; Minihane Kevin-kminih01;
> 'MADMAN'
> Cc: ccielab@groupstudy.com
> Subject: RE: Strange trunking issue
>
>
>
> One of the hosts is running Solaris, (hostB), while HostA is a
> Linux (ReHat) machine. I've also put another Solaris host onto the
> 5500, with the same effect.
>
> I've used a packet sniffer to check for windowing (or rather,
> for continuous changes in the windowing) and everything appears
normal.
> I'm not seeing excessive traffic, or changes in the window sizes.
>
> All hosts are running at 100 Mbs Full duplex. I've played
> around with auto settings on each switch, and still have the same
> result.
>
> The mtu on both is 1500, and (using a packet sniffer) I've
> checked the packet size of the FTP data. This is 1518, which is
> correct? (to include the headers etc?)
>
> Both hosts are in the same VLAN.
>
> This is doing my head in!
>
>
> -----Original Message-----
> From: Robert Fischer [mailto:rfischer@broadcom.com]
> Sent: 16 April 2004 01:09
> To: 'Church, Chuck'; 'Minihane Kevin-kminih01'; 'MADMAN'
> Cc: ccielab@groupstudy.com
> Subject: RE: Strange trunking issue
>
>
> What are the hosts running, Windows/ linux? What are the host
> uplinks,
> 10/100? The host connected to the 5500 may be overrunning the
> 5500's port
> buffer. Capture some packets on the 5500 size and watch for the
> windowing
> size to continuously change and the host to retransmit. Newer
> versions of
> Windows like XP are defaulting to 64K window sizes and causing
> port buffer
> issues with older gear. Some versions of Red Hat have difficulty
> negotiating
> this too.
>
> -Robb
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
> Behalf Of
> Church, Chuck
> Sent: Thursday, April 15, 2004 10:35 AM
> To: Minihane Kevin-kminih01; MADMAN
> Cc: ccielab@groupstudy.com
> Subject: RE: Strange trunking issue
>
>
> So now put the Host B on the 3550, and see if the problem
> exists. Any
> chance it's an MTU issue? Are A and B in the same VLAN? If
> not, who's
> routing, the 3550?
>
>
> Chuck Church
> Lead Design Engineer
> CCIE #8776, MCNE, MCSE
> Wam!Net Government Services - Design & Implementation Team 13665
> Dulles
> Technology Dr. Ste 250 Herndon, VA 20171
> Office: 703-480-2569
> Cell: 703-819-3495
> cchurch@wamnetgov.com
> PGP key:
>
>
http://pgp.mit.edu:11371/pks/lookup?op=index&search=cchurch%40wamnetgov.
> com
> -----Original Message-----
> From: Minihane Kevin-kminih01
> [mailto:Kevin.Minihane@motorola.com]
> Sent: Thursday, April 15, 2004 12:23 PM
> To: 'MADMAN'; Minihane Kevin-kminih01
> Cc: ccielab@groupstudy.com
> Subject: RE: Strange trunking issue
>
> Hiya
>
> Thanks for the input. I moved hostB onto the 5500, and the
> problem
> disapeared. I put it back onto the 3550, and the same problem
> exists
>
>
>
> -----Original Message-----
> From: MADMAN [mailto:dmadlan@qwest.com]
> Sent: 15 April 2004 17:04
> To: Minihane Kevin-kminih01
> Cc: ccielab@groupstudy.com
> Subject: Re: Strange trunking issue
>
>
>
> Your assuming you have a switching problem accross the trunk.
> Plug host
> B into the 5500 and see if you still have the problem.
>
> Dave
>
> Minihane Kevin-kminih01 wrote:
>
> > Hi
> >
> > Apologies in advance if this seems long winded, but I wanted
> to attach
> the configurations, and output of various commands.
> >
> > I'm experiencing a very strange trunking issue, and was
> wondering if
> anyone could perhaps have some input which might help?
> >
> >
> > The following is my layout.
> >
> >
> > Host A ------- Cat5500 ------------------------------ Cat3550
> > ------------ Host B
> >
> > Each host is connected to it's switch using a 100Mb full
> duplex
> > connection
> >
> > I have two switches (cat 5500 running CatOS, and a 3550). I'm
> trunking between both using dot1q encapsulation. Vtp
> information is flowing
> freely between them, and I can configure vlans on both,
> propagate the vlans
> between each switch, etc. The trunk between the switches is a
> gigabit fibre
> connection.
> >
> > The problem I am having is when I try to ftp from host A to
> host B,
> and vice versa.
> >
> > If I ftp from Host A to Host B, I experience very slow speeds
> > (sometimes as low as 24k per second). If I come from Host B
> to host
> > A, the speed increases to 8Mbs per second! I've checked the
> usual
> > (speed, duplex, check for CRC, dropped packets) and I get
> nothing
> >
> > The following is the config of the interface g0/1 on the 3550
> >
> > Lab_3550_1#show run int g0/1
> > Building configuration...
> >
> > Current configuration : 169 bytes
> > !
> > interface GigabitEthernet0/1
> > description Trunk to main lab 5500 port 1/1 switchport trunk
> > encapsulation dot1q switchport mode dynamic desirable no ip
> address
> > end
> >
> > This is the output when I type the "show int g0/1" command on
> the 3550
> >
> > Lab_3550_1#show int g0/1
> > GigabitEthernet0/1 is up, line protocol is up (connected)
> > Hardware is Gigabit Ethernet, address is 000d.bc49.44b1 (bia
> 000d.bc49.44b1)
> > Description: Trunk to main lab 5500 port 1/1
> > MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
> > reliability 255/255, txload 1/255, rxload 1/255
> > Encapsulation ARPA, loopback not set
> > Keepalive set (10 sec)
> > Full-duplex, 1000Mb/s, link type is auto, media type is SX
> > output flow-control is off, input flow-control is off
> > ARP type: ARPA, ARP Timeout 04:00:00
> > Last input 00:00:00, output 00:00:00, output hang never
> > Last clearing of "show interface" counters 01:52:54
> > Input queue: 0/75/0/0 (size/max/drops/flushes); Total output
> drops:
> 0
> > Queueing strategy: fifo
> > Output queue: 0/40 (size/max)
> > 5 minute input rate 1962000 bits/sec, 471 packets/sec
> > 5 minute output rate 1707000 bits/sec, 428 packets/sec
> > 2818750 packets input, 1023156797 bytes, 0 no buffer
> > Received 293096 broadcasts (0 multicast)
> > 0 runts, 0 giants, 0 throttles
> > 1 input errors, 1 CRC, 0 frame, 0 overrun, 0 ignored
> > 0 watchdog, 224737 multicast, 0 pause input
> > 0 input packets with dribble condition detected
> > 2635991 packets output, 1397912368 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
> >
> > And finally, on the 3550, I "show int trunk"
> >
> > Lab_3550_1#show int trunk
> >
> > Port Mode Encapsulation Status Native
> vlan
> > Fa0/45 desirable isl trunking 44
> > Fa0/46 desirable isl trunking 44
> > Fa0/47 on isl trunking 41
> > Gi0/1 desirable 802.1q trunking 1
> > Gi0/2 desirable 802.1q trunking 41
> >
> > Port Vlans allowed on trunk
> > Fa0/45 1-4094
> > Fa0/46 1-4094
> > Fa0/47 1-4094
> > Gi0/1 1-4094
> > Gi0/2 1-4094
> >
> > Port Vlans allowed and active in management domain
> > Fa0/45
>
>
1,10,12,20,25,28,30-33,35-41,44-45,48,52,54-55,60,130,341,351-352,361,36
> 9,400-406,419,995
> > Fa0/46
>
>
1,10,12,20,25,28,30-33,35-41,44-45,48,52,54-55,60,130,341,351-352,361,36
> 9,400-406,419,995
> > Fa0/47
>
>
1,10,12,20,25,28,30-33,35-41,44-45,48,52,54-55,60,130,341,351-352,361,36
> 9,400-406,419,995
> > Gi0/1
>
>
1,10,12,20,25,28,30-33,35-41,44-45,48,52,54-55,60,130,341,351-352,361,36
> 9,400-406,419,995
> > Gi0/2
>
>
1,10,12,20,25,28,30-33,35-41,44-45,48,52,54-55,60,130,341,351-352,361,36
> 9,400-406,419,995
> >
> > Port Vlans in spanning tree forwarding state and not
> pruned
> > Fa0/45 1,41,44,351,361,400
> > Fa0/46 1
> > Fa0/47
>
>
1,10,12,20,25,28,30-33,35-41,44-45,48,52,54-55,60,130,341,351-352,361,36
> 9,400-406,419,995
> > Gi0/1
>
>
1,10,12,20,25,28,30-33,35-41,44-45,48,52,54-55,60,130,341,351-352,361,36
> 9,400-406,419,995
> > Gi0/2 1,41,403-406
> >
> >
> >
> > On my 5500 I do the following:
> >
> > 5500-OMCLAB (enable) show port capabilities 1/1
> > Model WS-X5530
> > Port 1/1
> > Type 1000BaseSX
> > Speed 1000
> > Duplex full
> > Trunk encap type 802.1Q,ISL
> > Trunk mode on,off,desirable,auto,nonegotiate
> > Channel no
> > Broadcast suppression percentage(0-100)
> > Flow control
> receive-(off,on,desired),send-(off,on,desired)
> > Security no
> > Membership static
> > Fast start yes
> > QOS n/a
> > Rewrite no
> > UDLD Capable
> >
> >
> >
> >
> > 5500-OMCLAB (enable) show port 1/1
> > Port Name Status Vlan Level Duplex
> Speed
> Type
> > ----- ------------------ ---------- ---------- ------ ------
> -----
> ------------
> > 1/1 Trunk to lab_3550_ connected trunk normal full
> 1000
> 1000BaseSX
> >
> > Port Trap IfIndex
> > ----- -------- -------
> > 1/1 disabled 224
> >
> > Port Broadcast-Limit Broadcast-Drop
> > -------- --------------- --------------
> > 1/1 - 0
> >
> > Port Send FlowControl Receive FlowControl RxPause
> TxPause
> Unsupported
> > admin oper admin oper
> opcodes
> > ----- -------- -------- -------- -------- -------
> -------
> -----------
> > 1/1 desired off off off 0 0
> 0
> >
> >
> > Port Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize
> > ----- ---------- ---------- ---------- ---------- ---------
> > 1/1 0 0 0 0 0
> >
> > Port Single-Col Multi-Coll Late-Coll Excess-Col Carri-Sen
> Runts
> Giants
> > ----- ---------- ---------- ---------- ---------- ---------
> ---------
> ---------
> > 1/1 0 0 0 0 0
> 0
> -
> >
> > Last-Time-Cleared
> > --------------------------
> > Thu Apr 15 2004, 10:04:41
> >
> >
> > 5500-OMCLAB (enable) show trunk
> > Port Mode Encapsulation Status Native
> vlan
> > -------- ----------- ------------- ------------
> -----------
> > 1/1 on dot1q trunking 1
> > 1/2 on dot1q trunking 1
> >
> >
> ______________________________________________________________________
> > _ Please help support GroupStudy by purchasing your study
> materials
> > from:
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> >
>
> --
> David Madland
> CCIE# 2016
> Sr. Network Engineer
> Qwest Communications
> 612-664-3367
>
> "Emotion should reflect reason not guide it"
>
>
>
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