Sam Sneed wrote:
> 
> If the port is no connected why would it attempt to send
> unicasts packets
> through it? 

Well, notice that I said broadcasts not unicasts. It shouldn't send unicasts
to a disconnected port because it couldn't have learned of any MAC addresses
out that port. Well, while still trying to learn the location of MAC
addresses, it could, I guess. Flooding out all ports for an unknown unicast
is normal.

How do you know that it's ending unicasts to the port??

> Passing packets to a switchport in the diconnected
> state would
> not make sense.
> I imagine that the logic built into the siwtch would not do
> this. 

Yes, I would imagine that too, but I wouldn't be surprised to learn that
it's not that smart, on the other hand.

> I have
> other switches, Extreme networks, that do not register any
> dropped packets
> for unplugged interfaces. Neither do Cisco 2924XL aor 3548XL. I
> believe for
> some reason its dropping valid packets. It would be hard to
> confirm this but
> it seems TCP connections are being dropped on some servers.

So you think that its CAM bridging table is messed up and it's sending
packets that should go out a live port to a port where nothing is
connected?? The only way it would send a packet to the wrong port and cause
TCP connections to be dropped was if the cam table was corrupted. That could
mean bad memory or it could be a bad static cam entry.

I agree that this is squirrely. Call TAC??

Good luck. Keep us posted. Thanks.

Priscilla


> 
> 
> ""Priscilla Oppenheimer""  wrote in
> message
> news:[EMAIL PROTECTED]...
> > If nothing's plugged in, it has to drop the packets!?! :-)
> Are you sure
> this
> > isn't normal? Being a switch, it shouldn't be sending any
> unicasts out the
> > port, because it couldn't have learned a MAC address that is
> out that
> port,
> > but it could still send broadcasts and multicasts.
> >
> > Sorry, if that's a clueless answer, but it is a "common
> sense" answer from
> > someone who doesn't work with 6505 switches...... :-)
> >
> > Priscilla
> >
> > Sam Sneed wrote:
> > >
> > > I'm not sure what you mean by hybrid mode. I have the sh
> ver,
> > > sh mod, sh ver
> > > for MSFC and  below. I have nothing plugged into at leat 3
> > > ports which still
> > > report dropped packets. 800,000 daily. Whats strange is that
> > > the 800,000 is
> > > almost the same on all 3 ports. I have disabled them since
> then
> > > but would
> > > like to know why I was getting those numbers. The MSFC does
> the
> > > layer 3
> > > routing, but the dropped packets were at L2 I believe. Any
> > > ideas?
> > >
> > > Console1> sh ver
> > > WS-C6509 Software, Version NmpSW: 7.1(2)
> > > Copyright (c) 1995-2002 by Cisco Systems
> > > NMP S/W compiled on Feb  7 2002, 16:06:00
> > >
> > > System Bootstrap Version: 5.3(1)
> > >
> > > Hardware Version: 2.0  Model: WS-C6509  Serial #:
> > >
> > > PS1  Module: WS-CAC-2500W    Serial #:
> > > PS2  Module: WS-CAC-1300W    Serial #:
> > >
> > > Mod Port Model               Serial #    Versions
> > > --- ---- ------------------- -----------
> ---------------------
> > > 1   2    WS-X6K-SUP1A-2GE    SA         Hw :         3.1
> > >                                          Fw : 5.3(1)
> > >                                          Fw1: 5.1(1)CSX
> > >                                          Sw : 7.1(2)
> > >                                          Sw1: 7.1(2)
> > >          WS-F6K-PFC          S            Hw : 1.1
> > > 2   2    WS-X6K-SUP1A-2GE    SAxxxxxxxxxx Hw : 3.1
> > >                                          Fw : 5.3(1)
> > >                                          Fw1: 5.1(1)CSX
> > >                                          Sw : 7.1(2)
> > >                                          Sw1: 7.1(2)
> > >          WS-F6K-PFC          Sxxxxxxxxxx Hw : 1.1
> > > 3   48   WS-X6348-RJ-45      SAxxxxxxxxx Hw : 1.4
> > >                                          Fw : 5.4(2)
> > >                                          Sw : 7.1(2)
> > > 4   48   WS-X6348-RJ-45      xxxxxxxxxxxx Hw : 6.0
> > >                                          Fw : 5.4(2)
> > >                                          Sw : 7.1(2)
> > >          WS-F6K-VPWR                     Hw : 1.0
> > > 5   48   WS-X6348-RJ-45      SAL0xxxx422 Hw : 6.0
> > >                                          Fw : 5.4(2)
> > >                                          Sw : 7.1(2)
> > >          WS-F6K-VPWR                     Hw : 1.0
> > > 6   16   WS-X6416-GBIC       SAxxxxx0JUW Hw : 1.2
> > >                                          Fw : 5.4(2)
> > >                                          Sw : 7.1(2)
> > > 7   48   WS-X6248-TEL        SAD0xxxxx48 Hw : 1.0
> > >                                          Fw : 4.2(0.24)VAI78
> > >                                          Sw : 7.1(2)
> > > 8   48   WS-X6248A-TEL       SADxxxxxx0S Hw : 2.0
> > >                                          Fw : 5.4(2)
> > >                                          Sw : 7.1(2)
> > > 9   48   WS-X6248A-TEL       SADxxxxxxRZ Hw : 2.0
> > >                                          Fw : 5.4(2)
> > >                                          Sw : 7.1(2)
> > > 15  1    WS-F6K-MSFC         SAD04xx0DSF Hw : 1.4
> > >                                          Fw : 12.1(3a)E4
> > >                                          Sw : 12.1(3a)E4
> > > 16  1    WS-F6K-MSFC         SAD04xx0BHV Hw : 1.4
> > >                                          Fw : 12.1(3a)E4
> > >                                          Sw : 12.1(3a)E4
> > >
> > >        DRAM                    FLASH                   NVRAM
> > > Module Total   Used    Free    Total   Used    Free   
> Total U
> > > ------ ------- ------- ------- ------- ------- -------
> ----- -
> > > 1       65408K  44172K  21236K  16384K   9786K   6598K  512K
> > >
> > > Uptime is 352 days, 4 hours, 30 minutes
> > >
> > >
> > > Console1> sh mod
> > > Mod Slot Ports Module-Type               Model
> > > Sub Status
> > > --- ---- ----- ------------------------- -------------------
> > > --- ------
> > > 1   1    2     1000BaseX Supervisor      WS-X6K-SUP1A-2GE
> > > yes ok
> > > 15  1    1     Multilayer Switch Feature WS-F6K-MSFC
> > > no  ok
> > > 2   2    2     1000BaseX Supervisor      WS-X6K-SUP1A-2GE
> > > yes standb
> > > 16  2    1     Multilayer Switch Feature WS-F6K-MSFC
> > > no  ok
> > > 3   3    48    10/100BaseTX Ethernet     WS-X6348-RJ-45
> > > no  ok
> > > 4   4    48    10/100BaseTX Ethernet     WS-X6348-RJ-45
> > > yes ok
> > > 5   5    48    10/100BaseTX Ethernet     WS-X6348-RJ-45
> > > yes ok
> > > 6   6    16    1000BaseX Ethernet        WS-X6416-GBIC
> > > no  ok
> > > 7   7    48    10/100BaseTX Ethernet     WS-X6248-TEL
> > > no  ok
> > > 8   8    48    10/100BaseTX Ethernet     WS-X6248A-TEL
> > > no  ok
> > > 9   9    48    10/100BaseTX Ethernet     WS-X6248A-TEL
> > > no  ok
> > >
> > >
> > > 6509>sh ver
> > > Cisco Internetwork Operating System Software
> > > IOS (tm) MSFC Software (C6MSFC-IS-M), Version 12.1(3a)E4,
> EARLY
> > > DEPLOYMENT
> > > RELEASE SOFTWARE (fc1)
> > > Copyright (c) 1986-2000 by cisco Systems, Inc.
> > > Compiled Sat 14-Oct-00 00:01 by eaarmas
> > > Image text-base: 0x60008950, data-base: 0x60DA8000
> > >
> > > ROM: System Bootstrap, Version 12.0(3)XE, RELEASE SOFTWARE
> > > BOOTFLASH: MSFC Software (C6MSFC-BOOT-M), Version 12.1(1)EX,
> > > EARLY
> > > DEPLOYMENT RELEASE SOFTWARE (fc1)
> > >
> > > 6509 uptime is 50 weeks, 2 days, 4 hours, 45 minutes
> > > System returned to ROM by power-on
> > > Running default software
> > >
> > > cisco Cat6k-MSFC (R5000) processor with 114688K/16384K
> bytes of
> > > memory.
> > > Processor board ID SAD04130DSF
> > > 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.
> > > 6 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
> > >
> > > 6509>
> > >
> > >
> > >
> > > ""MADMAN""  wrote in message
> > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > > > Not real clear on your description.  You see dropped
> packets
> > > on
> > > > interfaces with nothing plugged in!?  Since you refer to
> the
> > > 6500 as a
> > > > switch I assume your running hybrid mode.  You also
> mention
> > > there is an
> > > > MSFC.  I ASSume again that your seeing drops on the L2
> > > interface but
> > > > with nothing plugged into it is a bit strange indeed!  Can
> > > you send more
> > > > info?
> > > >
> > > >    Dave
> > > >
> > > > Sam Sneed wrote:
> > > > > Hello,
> > > > >
> > > > > I'm seeing strange things on a 6500 switch. I see
> dropped
> > > pakets and int
> > > > > errors on interfaces with no servers plugged in. These
> are
> > > of signifcant
> > > > > amounts and I believe tis causing problems.We're talking
> > > about 800,000
> > > in
> > > > 24
> > > > > hours. Does anyone have any idea on what this happens on
> > > INT that aren't
> > > > > even active?
> > > > >
> > > > > This switch has a layer3 sup1a card that does the
> routing
> > > for it.
> > > > --
> > > > David Madland
> > > > CCIE# 2016
> > > > Sr. Network Engineer
> > > > Qwest Communications
> > > > 612-664-3367
> > > >
> > > > "You don't make the poor richer by making the rich
> poorer."
> > > --Winston
> > > > Churchill
> 
> 




Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=63178&t=63053
--------------------------------------------------
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]

Reply via email to