Nortel Networks 450 - Manual (Page 41)

BayStack 450 10/100/1000 Series Switches
302401-D Rev 00 1-15
IGMP Snooping Feature
For conserving bandwidth and controlling IP Multicast, the IGMP snooping
feature can provide the same benefit as IP Multicast routers, but in the local area.
For more information about the IGMP snooping feature, see “IGMP Snooping ” on
page 1-48 .
Flash Memory Storage
Storage of Switch Software Image
The BayStack 450 switch uses flash memory to store the switch software image.
The flash memory allows you to update the software image with a newer version
without changing the switch hardware (see “Software Download” on page 3-78).
An in-band connection between the switch and the TFTP load host is required to
download the software image.
If a BootP server is set up properly on the network and the BayStack 450 switch
detects a corrupted software image during the self-test, the switch automatically
uses TFTP to download a new software image.
Storage of Configuration Parameters
Certain configuration parameters, including the system characteristics strings,
some VLAN parameters, IGMP configuration parameters, and the MultiLink
Trunk names are stored in flash memory. These parameters are updated every 10
minutes or whenever a reset command is executed.
Note: Do not power off the switch within 10 minutes of changing any
configuration parameters. Powering down the switch within 10 minutes of
changing configuration parameters can cause the changed configuration
parameters to be lost.
kombk.book Page 15 Tuesday, June 29, 1999 3:25 PM