160
C
HAPTER
7: LAN E
MULATION
V
ERSIONS
1.0
AND
2.0
You verify if the LECS-based LANE redundancy mode is enabled through
the LMA (see “Display LE Service Redundancy” on page 263 in the
Management Guide).
LANE Redundancy
Start-up Delay
The LANE redundancy mechanism does not begin operating at system
power-up but rather has a user-adjustable start-up delay. There are two
reasons for this delay:
To allow time for the routing table in the switch to become established
To allow time for the LES and any installed CoreBuilder 7X00 cards to
start up and become initialized
Only after the start-up delay does the LECS begin establishing ATM
connections to the LESes in the network. During the delay period, all
requesting LECs are assigned to the primary LES of the requested ELAN.
The delay period can be adjusted by LMA and defaults to 600 seconds.
(See “Update Startup Delay” on page 265 in the Management Guide.)
LANE Redundancy
Limitations
The following are the LANE redundancy limitations:
Number of LECs which are allowed to connect to the CoreBuilder
7000 switch:
When LANE redundancy enabled: 269
When LANE redundancy disabled: 349
Number of redundant ELANs: 64
If you assign a redundant LES to more than 64 ELANs you cannot change
to the LECS-based LANE redundancy mode.
Number of LES per ELAN: 2
Start up delay: 1-15 minutes, defaults to 10 minutes (user adjustable)
LANE Redundancy
Planning
The following points should be taken into account when planning your
network to support LANE redundancy (see “Planning a Network with
E-IISP” on page 58 in the Management Guide for more information on
network planning).
ATM address structure and physical network connectivity should allow
for route recovery in case of switch or link failure.
Primary and secondary LESes for an ELAN should not be on the same
switch.
Summary of Contents for CoreBuilder 7000
Page 12: ......
Page 30: ...30 CHAPTER 1 ATM NETWORK BASICS...
Page 32: ...32 CHAPTER 1 ATM NETWORK BASICS...
Page 34: ...34 CHAPTER 1 ATM NETWORK BASICS Figure 8 LANE Network over WAN...
Page 96: ...96 CHAPTER 4 PRIVATE NETWORK TO NETWORK INTERFACE PNNI VERSION 1 0...
Page 184: ...184 CHAPTER 7 LAN EMULATION VERSIONS 1 0 AND 2 0...
Page 206: ...206 CHAPTER 9 DEVICE MANAGEMENT...
Page 222: ...222 APPENDIX A TECHNICAL SUPPORT...
Page 234: ...234 APPENDIX B PROTOCOLS AND INTERFACES...
Page 238: ...238 APPENDIX C COREBUILDER 7000 FAMILY ATM SWITCH SPECIFICATIONS...
Page 242: ...242 APPENDIX D SAFETY INFORMATION...
