Configuration Guide User guide

FastIron Configuration Guide xi
53-1002494-02
IronStack troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .315
Troubleshooting an unsuccessful stack build . . . . . . . . . . . . .315
Troubleshooting a stacking upgrade. . . . . . . . . . . . . . . . . . . . . 317
Troubleshooting image copy issues . . . . . . . . . . . . . . . . . . . . .318
Stack mismatches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .318
Image mismatches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .319
Advanced feature privileges (FCX devices only). . . . . . . . . . . .319
Configuration mismatch for stack units . . . . . . . . . . . . . . . . . .320
Auto Image Copy for stack units . . . . . . . . . . . . . . . . . . . . . . . .321
Memory allocation failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . .322
Recovering from a stack unit mismatch. . . . . . . . . . . . . . . . . .323
Troubleshooting secure-setup. . . . . . . . . . . . . . . . . . . . . . . . . .324
Troubleshooting unit replacement issues . . . . . . . . . . . . . . . .324
More about IronStack technology . . . . . . . . . . . . . . . . . . . . . . . . . .325
Configuration, startup configuration files,
and stacking flash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .325
IronStack topologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .326
Port down and aging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .326
Brocade IronStack device roles and elections. . . . . . . . . . . . .326
Hitless stacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .329
Supported hitless stacking events . . . . . . . . . . . . . . . . . . . . . .329
Non-supported hitless stacking events . . . . . . . . . . . . . . . . . .330
Supported hitless stacking protocols and services. . . . . . . . .330
Hitless stacking configuration notes and feature limitations .333
What happens during a hitless stacking switchover or
failover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .333
Standby Controller role in hitless stacking. . . . . . . . . . . . . . . .335
Support during stack formation, stack merge,
and stack split . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .337
Hitless stacking default behavior . . . . . . . . . . . . . . . . . . . . . . .340
Hitless stacking failover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .342
Hitless stacking switchover . . . . . . . . . . . . . . . . . . . . . . . . . . . .343
Displaying information about hitless stacking . . . . . . . . . . . . .350
Displaying information about stack failover. . . . . . . . . . . . . . .350
Displaying information about link synchronization status . . .350
Syslog messages for hitless stacking failover
and switchover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .351
Chapter 8 IPv6 Configuration on FastIron X Series, FCX, and ICX Series
Switches
Full Layer 3 IPv6 feature support. . . . . . . . . . . . . . . . . . . . . . . . . . .355
IPv6 addressing overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .355
IPv6 address types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .356
IPv6 stateless auto-configuration . . . . . . . . . . . . . . . . . . . . . . .358
IPv6 CLI command support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .358