Commit 28eead4a authored by Mike Hibler's avatar Mike Hibler
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Dealing with hung 100/1000Mb ports

From Ted Faber <faber@ISI.EDU>
parent 450e2d17
......@@ -237,7 +237,24 @@ ID Name Members of VLAN
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/12_1e/swconfig/span.htm
13. Good reference for making nodes boot quickly (ensuring that port spanning,
13. Stuck 1000/100/10 ports [ ISI - faber@isi.edu ]
Occasionally Gigabit switch ports seem to get stuck in a state where
they do not output packets to the host connected to them. We're not
sure why this happens (we're looking), but there is a fix. Simply
toggle the speed using
set port speed module/port 1000
and then back to whatever speed it was originally set for. Of course
if it was originally 1000 Mb/s the first set should be to 100 and
then back to 1000. We have seen ports lock up this way configured to
both 1000 and 100 Mb/sec.
You may have to both toggle the switch speed and re-ifconfig the host
NICs to re-establish connectivity.
14. Good reference for making nodes boot quickly (ensuring that port spanning,
trunking, etc. are off on the switch port):
http://www.cisco.com/warp/public/473/12.html
......@@ -250,7 +267,7 @@ ID Name Members of VLAN
(combining multiple ports to make a fast link) and trunking (a single
port serving multiple VLANs).
14. Good reference for how IGMP snooping (used for multicast) works:
15. Good reference for how IGMP snooping (used for multicast) works:
http://www.cisco.com/warp/public/473/22.html
......@@ -258,11 +275,11 @@ ID Name Members of VLAN
heading "IGMP Snooping", and some more in "Practical Example of IGMP
Snooping"
15. IOS for guys who know CatOS: (ie. me)
16. IOS for guys who know CatOS: (ie. me)
http://www.cisco.com/warp/public/cc/pd/si/casi/ca6000/tech/cat65_wp.htm
16. For into on how the switches do load balancing on etherchannel
17. For into on how the switches do load balancing on etherchannel
(aka "trunk") links:
http://www.cisco.com/warp/public/473/4.html
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