IBM Switch 9077 - Manual (Page 117)

Installation and Configuration 99
3.14.3 Reset Media Card Using grreset
Use the grreset command to reset a media card from the UNIX prompt:
1. Log in as root on the SP Switch Router.
2. Enter the grreset command.
Specify the appropriate media card by its chassis slot number. To reset all the
media cards, enter
grreset all ; to reset the media cards in slot 0, enter
grreset 0 ; to reset the card in slot 4 and dump its memory, use grreset -D 4 ;
to reset the card in slot 4 and return debug information, enter grreset -d 4 .
Note: The grreset command can be used on a media card without disturbing
normal SP Switch Router function.
You should, however, fence the SP Switch Router Adapter card before you
issue a
grreset command against it. This prevents some unexpected
behavior of the SP primary node. Use the following command on the CWS:
Efence -autojoin node_number.
With the autojoin flag set, the SP Switch Router Adapter card is supposed to
integrate automatically into the SP Switch network after a
grreset command.
Without the autojoin flag, Eunfence or Estart need to be issued.
Refer to the command section in the GRF Configuration Guide 1.4, GA22-
7366 for a description of grreset . Refer to RS/6000 SP: Command Reference
Version 2 Release 4, GC23-3900, for a description of Efence , Eunfence and
Estart .
3.14.4 Using grstat to Display GRF Statistics
You might want to periodically watch what is going on on the SP Switch
Router Adapter card. Use the command
grstat -w70 all gt0?0 to obtain
information about packets sent, received, forwarded, dropped or fragmented.
Also, this command will give you an overview of the last errors that caused
packets to be dropped or resent.