5-6
October, 1998
GRF 400/1600 Getting Started - 1.4 Update 2
Cabling and Verifying Media Cards
Inserting a media card into the GRF
Hot swapping media cards
GRF media cards are hot-swappable per media type. That is, you can swap out a HSSI card and
replace it with another HSSI card. When the new HSSI card starts up and boots, it is identified
to the system and is ready to be configured. Any IP addresses assigned to the HSSI card
removed from slot 5, for example, are automatically assigned to the new HSSI card inserted
into slot 5.
If you plan to change the type of media card that will replace the HSSI card, then you must
reset the system to re-identify the new card.
After you insert the new type of media card but before you reset the GRF, output from the
grcard command displays the actual media type but also indicates the previous media. This is
the grcard output after a FDDI card has been inserted into the newly-vacated slot but before
the GRF is reset:
# grcard
0 HSSI running
1 HSSI running
2 FDDI held-reset (ERROR: must be HSSI)
3 HSSI running
Q cards
A /Q card has dedicated hardware support for expanded route table lookup.
For FDDI and ATM cards, the
_v2
after in grcard output indicates the card is a /Q version of
that type of card. All Ethernet, HSSI, ATM OC-12c, and SONET cards have the /Q hardware
although they appear in grcard output as
_v1
. There is one version of HIPPI, these cards do
not have /Q hardware.
Burning in media card flash memory
grflash provides the ability to upgrade flash code at customer sites. The grflash command
reprograms (reburns) the code in internal flash (the boot loader). This is different than updating
the system software with a new release. Typically, new software releases are loaded into the
system and then downloaded into the specific type of media card, they do not require burning
into internal flash. The reburn procedure is done only under direction of Customer Support.
Please work with Customer Support to schedule a session with them in the rare instance that
the grflash command is needed. If not carefully and correctly done, the reburn process could
disable the memory component and the GRF. A grflash man page is available, and the
command is also described in the GRF Reference Guide.
