Commit 28eead4a authored by Mike Hibler's avatar Mike Hibler
Browse files

Dealing with hung 100/1000Mb ports

From Ted Faber <faber@ISI.EDU>
parent 450e2d17
...@@ -237,7 +237,24 @@ ID Name Members of VLAN ...@@ -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 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): trunking, etc. are off on the switch port):
http://www.cisco.com/warp/public/473/12.html http://www.cisco.com/warp/public/473/12.html
...@@ -250,7 +267,7 @@ ID Name Members of VLAN ...@@ -250,7 +267,7 @@ ID Name Members of VLAN
(combining multiple ports to make a fast link) and trunking (a single (combining multiple ports to make a fast link) and trunking (a single
port serving multiple VLANs). 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 http://www.cisco.com/warp/public/473/22.html
...@@ -258,11 +275,11 @@ ID Name Members of VLAN ...@@ -258,11 +275,11 @@ ID Name Members of VLAN
heading "IGMP Snooping", and some more in "Practical Example of IGMP heading "IGMP Snooping", and some more in "Practical Example of IGMP
Snooping" 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 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: (aka "trunk") links:
http://www.cisco.com/warp/public/473/4.html http://www.cisco.com/warp/public/473/4.html
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