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Redundant Switching Module 7-11
Info Based on the
MAC Address
Each switching module board has a unique MAC address burned into its
EPROM. This MAC address is used by the CoreBuilder 7000 for three
purposes:
For the IP stack
For the LES ATM address user part
For calculating a unique number to be assigned to the ELAN name.
The ELAN names have the format ELANxxxx_y where
xxxx
is a unique
number calculated using the MAC address and y is an integer from 0 to
15 automatically assigned to each of the 16 default LESs of the
CoreBuilder 7000. In this way, each LES has a unique ELAN name and
unique ATM address.
When a redundant switching card takes over after the primary switching
card fails, the IP address, the ELAN names and LES address remain the
same as they were in the primary switch.
Publishing the New MAC Address
A redundant switch that has become active sends a reverse ARP (RARP) to
publish its MAC address to the network devices.
For devices that do not learn MAC addresses from a RARP, you will need
to reset the IP address entry of the CoreBuilder 7000 in their device table.
Resetting to Factory
Defaults
The ELAN names and LES addresses (user part) will be changed only if the
user performs a reset to factory defaults by LMA (or TELNET).
After resetting to factory defaults, the MAC address burned in the active
switch EPROM will supersede the one stored in the FLASH memory
resulting in new ELAN names and LES addresses.
Resetting to factory default will cause all connections to be dropped until
the new ELAN names are updated in the LECs.
NNI maximum number of hops for all
ports
Table 7-6
Updating Configuration Database (continued)
Data Transferred from Active to
Redundant Switch
Data to be Updated Manually in
Redundant Switch