Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 846
Stack Master Election
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Although the master and standby units are automatically selected by MAC address, you can configure PE priorities to specify which units are assigned the master and standby roles. Stack Master Election When a PE stack reloads and all stack units come up, all units participate in the stack master election. The master and standby units are chosen based on the priority or MAC address. The stack takes the MAC address of the master unit. • Unit priority - The range is from 1 to 14. The unit with the highest priority is elected the master management unit; the unit with the second highest priority is elected the standby unit. The default is 0. To remove a priority and set the priority to 0, enter the no stack-unit unit-number priority command in PE CONFIGURATION mode. • MAC address (if there is a priority tie) - By default, the unit with the highest MAC value becomes the master unit if no priorities are configured. A change in the stack master occurs when: • You power down the stack master. • A failover of the master switch occurs. • You disconnect the master switch from the stack. NOTE: If a stack unit does not boot up at the same time as the other units, it does not participate in the election process. Units that boot up late do not participate in the election process because the master and standby have already been elected. The unit that boots up late (even if they have a higher priority configured) joins as a member. To display the PE stack master, enter the show pe pe-id system brief command. The following example shows output from an established stack. Example of Displaying Stack Members Dell#show pe 0 system brief Stack MAC: a0:68:00:3f:92:bc -- Stack Info -- Unit UnitType Status ReqTyp CurTyp Version Ports 0 Management online C1048P C1048P 1-0(0-4879) 52 1 Member online C1048P C1048P 1-0(0-4879) 52 2 Standby online C1048P C1048P 1-0(0-4879) 52 3 Member online C1048P C1048P 1-0(0-4879) 52 4 Member online C1048P C1048P 1-0(0-4879) 52 5 Member online C1048P C1048P 1-0(0-4879) 52 6 Member online C1048P C1048P 1-0(0-4879) 52 7 Member online C1048P C1048P 1-0(0-4879) 52 Port Extender (PE) Stacking 846
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1,180
-
1,181
-
1,182
-
1,183
-
1,184
-
1,185
-
1,186
-
1,187
-
1,188
-
1,189
-
1,190
-
1,191
-
1,192
-
1,193
-
1,194
-
1,195
-
1,196
-
1,197
-
1,198
-
1,199
-
1,200
-
1,201
-
1,202
-
1,203
-
1,204
-
1,205
-
1,206
-
1,207
-
1,208
-
1,209
-
1,210
-
1,211
-
1,212
-
1,213
-
1,214
-
1,215
-
1,216
-
1,217
-
1,218
-
1,219
-
1,220
-
1,221
-
1,222
-
1,223
-
1,224
-
1,225
-
1,226
-
1,227
-
1,228
-
1,229
-
1,230
-
1,231
-
1,232
-
1,233
-
1,234
-
1,235
-
1,236
-
1,237
-
1,238
-
1,239
-
1,240
-
1,241
-
1,242
-
1,243
-
1,244
-
1,245
-
1,246
-
1,247
-
1,248
-
1,249
-
1,250
-
1,251