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Dell PowerSwitch S5212F-ON EMC SmartFabric OS10 User Guide Release 10.5.0 - Page 468

Root assignment

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ethernet1/1/8 128.288 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/9 128.292 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/10 128.296 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/11 128.300 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/12 128.304 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/13 128.308 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/14 128.312 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/15 128.316 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/16 128.320 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/17 128.324 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/18 128.328 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/19 128.332 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/20 128.336 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/21 128.340 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/22 128.344 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/23 128.348 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/24 128.352 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/25 128.356 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/26 128.360 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/27 128.364 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/28 128.368 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/29 128.372 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/30 128.376 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/31 128.380 128 200000000 FWD 0 32769 0000.0000.0000 ethernet1/1/32 128.384 128 200000000 FWD 0 32769 0000.0000.0000 Interface Name Role PortID Prio Cost Sts Cost Link-type Edge ethernet1/1/1 Disb 128.260 128 200000000 FWD 0 AUTO No ethernet1/1/2 Disb 128.264 128 200000000 FWD 0 AUTO No ethernet1/1/3 Disb 128.268 128 200000000 FWD 0 AUTO No ethernet1/1/4 Disb 128.272 128 200000000 FWD 0 AUTO No ethernet1/1/5 Desg 128.276 128 500 FWD 0 AUTO No ethernet1/1/6 Desg 128.280 128 500 FWD 0 AUTO No ethernet1/1/7 Disb 128.284 128 200000000 FWD 0 AUTO No ethernet1/1/8 Disb 128.288 128 200000000 FWD 0 AUTO No ethernet1/1/9 Disb 128.292 128 200000000 FWD 0 AUTO No ethernet1/1/10 Disb 128.296 128 200000000 FWD 0 AUTO No ethernet1/1/11 Disb 128.300 128 200000000 FWD 0 AUTO No 128.288 128.292 128.296 128.300 128.304 128.308 128.312 128.316 128.320 128.324 128.328 128.332 128.336 128.340 128.344 128.348 128.352 128.356 128.360 128.364 128.368 128.372 128.376 128.380 128.384 Root assignment Rapid-PVST assigns the root bridge according to the lowest bridge ID. Primary configuration assigns 24576 as the bridge priority whereas secondary configuration assigns 28672 as the bridge priority. spanning-tree vlan vlan-id root primary command ensures that the switch has the lowest bridge priority value by setting the predefined value of 24,576. If an alternate root bridge is required, use the spanning-tree vlan vlan-id root secondary command. The command sets the priority for the switch to the predefined value of 28,672. If the primary root bridge fails, the command ensures that the alternate switch becomes the root bridge. It also assumes that the other switches in the network have a defined default priority value of 32,768. • Configure the device as the root or secondary root in CONFIGURATION mode. spanning-tree vlan vlan-id root {primary | secondary} ○ vlan-id - Enter the VLAN ID number, from 1 to 4093. ○ primary - Enter the bridge as primary or root bridge. The primary bridge value is 24576. ○ secondary - Enter the bridge as the secondary root bridge. The secondary bridge value is 28672. Configure root bridge as primary OS10(config)# spanning-tree vlan 1 root primary Verify root bridge information OS10# show spanning-tree active Spanning tree enabled protocol rapid-pvst with force-version rstp VLAN 1 Executing IEEE compatible Spanning Tree Protocol 468 Layer 2

Section	Page
Dell EMC SmartFabric OS10 User Guide Release 10.5.0	3
Change history	28
Getting Started with Dell EMC SmartFabric OS10	31
Switch with factory-installed OS10	32
Log in	32
Check OS10 version	33
OS10 upgrade	33
Download OS10 image for upgrade	33
Install OS10 upgrade	33
Install OS10 upgrade	35
Install firmware upgrade	37
Upgrade commands	37
boot system	37
image cancel	37
image copy	38
image download	38
image install	38
show boot	39
show image firmware	40
show image status	40
show version	41
Check OS10 license	41
Re-install license	42
Switch without OS installed	42
Uninstall existing OS	43
Download OS10 image	43
Installation using ONIE	44
Automatic installation	44
Manual installation	46
Log in	46
Install OS10 license	47
Switch deployment options	49
Manual CLI configuration	49
ZTD-automated switch deployment	50
Ansible-automated switch provisioning	50
MX7000 Feb 2020 Solution Update Instructions	50
Remote access	57
Configure Management IP address	57
Configure Management route	58
Configure username and password	58
CLI Basics	60
CONFIGURATION mode	61
Check device status	61
Related Videos	63
Command help	63
Candidate configuration	64
Copy running configuration	66
Restore startup configuration	66
Reload system image	67
Filter show commands	67
Common OS10 commands	68
boot	68
commit	68
configure	68
copy	69
delete	70
dir	71
discard	72
do	72
end	72
exit	73
hostname	73
license	74
lock	74
management route	74
move	75
no	75
ping	76
ping6	77
reload	79
show boot	79
show candidate-configuration	80
show environment	82
show inventory	83
show ip management-route	83
show ipv6 management-route	84
show license status	84
show running-configuration	85
show startup-configuration	87
show system	88
show version	90
start	90
system	91
system-cli disable	91
system-user linuxadmin disable	92
system identifier	92
terminal	92
traceroute	93
unlock	94
username password role	94
write	95
Advanced CLI tasks	96
Command alias	96
Multi-line alias	97
alias	99
alias (multi-line)	100
default (alias)	101
description (alias)	101
line (alias)	101
show alias	102
Batch mode	103
batch	103
Linux shell commands	104
Using OS9 commands	106
feature config-os9-style	106
Dell EMC SmartFabric OS10 zero-touch deployment	107
ZTD DHCP server configuration	109
ZTD provisioning script	109
ZTD CLI batch file	110
Post-ZTD script	110
ZTD commands	111
reload ztd	111
show ztd-status	111
ztd cancel	112
Dell EMC SmartFabric OS10 provisioning	113
Using Ansible	113
Example: Configure an OS10 switch using Ansible	114
SmartFabric Services	117
SmartFabric Services personalities	117
SmartFabric Services for leaf and spine	117
SmartFabric Services for PowerEdge MX	118
SmartFabric Services for leaf and spine	119
SmartFabric Services Components	120
SmartFabric Services logical entities	121
Uplinks	122
Uplink bonding options	123
Spanning tree considerations	123
Dynamic onboarding for integrated devices	123
Statically onboarded server	123
Static onboarding for nonintegrated devices	124
Backup and Restore of fabric state	124
Enable SmartFabric Services on the switches	124
Enable SmartFabric Services using GUI	125
SmartFabric Services Graphical User Interface	125
Configure SmartFabric Services initial setup	126
Update Default Fabric, Switch Names, and Descriptions wizard	127
Create Uplink for External Network Connectivity wizard	127
Configure Layer 2 uplink	127
Configure Layer 3 VLAN uplink	127
Configure Layer 3 Routed uplink	128
Breakout Switch Ports wizard	128
Configure Jump Host wizard	129
Update Network Configuration wizard	129
Onboard a Server onto the Fabric wizard	129
Edit Default Fabric Settings wizard	129
Restore wizard	130
Fabric operations and life cycle management	130
Configuring FEC using MSM	130
SFS Support for MSTP on Layer3 fabric	130
SmartFabric commands	131
smartfabric l3fabric enable	131
smartfabric vlti	132
show smartfabric cluster	132
show smartfabric cluster member	133
show smartfabric details	134
show smartfabric networks	135
show smartfabric nodes	135
show smartfabric personality	136
show smartfabric uplinks	137
show smartfabric validation-errors	138
show smartfabric discovered-server	139
show smartfabric discovered-server discovered-server-interface	140
show smartfabric configured-server	140
show smartfabric configured-server configured-server-interface	141
SmartFabric Director	143
Enable SmartFabric Director mode on a switch	143
Support for SmartFabric Director	143
gRPC Network Management Interface agent	143
Lifecycle Management using SmartFabric Director	146
SmartFabric Director commands	147
switch-operating-mode	147
gnmi-security-profile	147
show switch-operating-mode	148
show sfd status	148
System management	149
System banners	149
Login banner	149
Message of the day banner	150
System banner commands	150
banner login	150
banner motd	151
User session management	151
User session management commands	152
exec-timeout	152
kill-session	152
show sessions	152
Telnet server	153
Telnet commands	153
ip telnet server enable	153
ip telnet server vrf	154
Simple Network Management Protocol	154
SNMP security models and levels	154
MIBs	155
SNMPv3	156
SNMP engine ID	156
SNMP groups and users	156
SNMP views	156
Configure SNMP	156
Configure SNMP engine ID	157
Configure SNMP views	157
Configure SNMP groups	157
Configure SNMP users	158
Generate SNMPv3 localized keys	159
Configure SNMP traps	159
Configure SNMP informs	160
SNMP commands	160
show snmp community	160
show snmp engineID	161
show snmp group	161
show snmp user	161
show snmp view	162
snmp-server community	162
snmp-server contact	163
snmp-server enable traps	163
snmp-server engineID	164
snmp-server group	164
snmp-server host	165
snmp-server location	166
snmp-server user	167
snmp-server view	168
snmp-server vrf	168
Example: Configure SNMP	169
System clock	169
Time zones and UTC offset reference	170
System Clock commands	187
clock set	187
clock timezone	187
show clock	188
show clock timezone	188
Network Time Protocol	189
Enable NTP	189
Broadcasts	190
Source IP address	190
Authentication	191
Sample NTP configuration	192
NTP commands	194
ntp authenticate	194
ntp authentication-key	195
ntp broadcast client	195
ntp disable	195
ntp enable vrf	196
ntp master	196
ntp server	196
ntp source	197
ntp trusted-key	197
show ntp associations	198
show ntp status	198
Dynamic Host Configuration Protocol	199
Packet format and options	200
DHCP server	201
Automatic address allocation	201
Hostname resolution	202
Manual binding entries	203
View DHCP Information	204
DHCP relay agent	205
Option 82 for security	205
DHCP snooping	205
DHCP snooping examples	209
DHCP snooping switch as a relay agent	211
DHCP snooping in a Layer 2 VLT setup	212
DHCP snooping with DHCP relay agent in a VLT setup	215
Dynamic ARP inspection	218
Source Address Validation	220
System domain name and list	221
DHCP commands	222
DHCP relay commands	222
ip helper-address	222
ipv6 helper-address	222
DHCP server commands	223
default-router address	223
disable	223
domain-name	224
dns-server address	224
hardware-address	224
host	224
ip dhcp server	225
lease	225
netbios-name-server address	225
netbios-node-type	226
network	226
pool	226
range	227
show ip dhcp binding	227
DHCP snooping commands	227
arp inspection	227
arp inspection-trust	228
arp inspection violation logging	228
clear ip arp inspection statistics	228
clear ip dhcp snooping binding	229
ip dhcp snooping (global)	229
ip dhcp snooping (interface)	230
ip dhcp snooping binding	230
ip dhcp snooping trust	230
ip dhcp snooping verify mac-address	231
show ip arp inspection database	231
show ip arp inspection statistics	232
show ip arp inspection logging	232
show ip dhcp snooping binding	232
DNS commands	233
ip domain-list	233
ip domain-name	233
ip host	233
ip name-server	234
show hosts	234
Interfaces	236
Ethernet interfaces	236
Unified port groups	236
Z9264F-ON port-group profiles	238
Port-groups on S5200F-ON switches	239
L2 mode configuration	246
L3 mode configuration	247
Fibre Channel interfaces	247
Configuring wavelength	249
Management interface	250
Management interface	250
VLAN interfaces	250
User-configured default VLAN	251
VLAN scale profile	251
Loopback interfaces	252
Port-channel interfaces	252
Create port-channel	253
Add port member	253
Minimum links	254
Assign Port Channel IP Address	254
Remove or disable port-channel	254
Load balance traffic	255
Change hash algorithm	255
Configure interface ranges	255
Switch-port profiles	256
S4148-ON Series port profiles	257
S4148U-ON port profiles	258
Configure negotiation modes on interfaces	259
Configure breakout mode	260
Breakout auto-configuration	261
Reset default configuration	262
Forward error correction	263
Energy-efficient Ethernet	264
Enable energy-efficient Ethernet	264
Clear EEE counters	265
View EEE status/statistics	265
EEE commands	266
clear counters interface eee	266
clear counters interface ethernet eee	266
eee	266
show interface eee	267
show interface eee statistics	267
show interface ethernet eee	267
show interface ethernet eee statistics	268
View interface configuration	268
Digital optical monitoring	271
Enable DOM and DOM traps	272
Default MTU Configuration	273
Interface commands	274
channel-group	274
default interface	274
default vlan-id	276
description (Interface)	277
duplex	278
enable dom	278
enable dom traps	278
feature auto-breakout	279
fec	279
interface breakout	280
interface ethernet	280
interface loopback	280
interface mgmt	281
interface null	281
interface port-channel	281
interface range	282
interface vlan	282
link-bundle-utilization	283
mode	283
mode l3	284
mtu	284
negotiation	285
port mode Eth	286
port-group	287
profile	287
scale-profile vlan	288
show discovered-expanders	288
show interface	289
show interface transceiver “Tunable wavelength”	290
show inventory media	291
show link-bundle-utilization	292
show port-channel summary	292
show port-group	293
show switch-port-profile	294
show system	294
show unit-provision	295
show vlan	296
shutdown	296
speed (Fibre Channel)	296
speed (Management)	297
switch-port-profile	297
switchport access vlan	299
switchport mode	299
switchport trunk allowed vlan	300
unit-provision	300
wavelength	301
default mtu	301
show default mtu	302
PowerEdge MX Ethernet I/O modules	303
Operating modes	303
Changing operating modes	305
Restrictions	305
Port groups on I/O modules	305
Double-density QSFP28 interfaces	305
Virtual ports	307
Single-density QSFP28 interfaces	310
Server-facing interfaces	312
Replace MX Ethernet I/O modules	313
Deployment instructions	313
Replace an IOM in Full-Switch VLT	313
Replace an IOM in SmartFabric	313
Remove and replace the faulty IOM	314
Verify and configure IOM settings	314
Identify the master IOM	314
Log in to the master IOM from the member	315
Initiate the module replacement workflow	316
Connect the new IOM	316
View SmartFabric Services configuration	316
Fibre Channel	317
Fibre Channel over Ethernet	318
Configure FIP snooping	318
Terminology	320
Virtual fabric	320
Fibre Channel zoning	322
F_Port on Ethernet	324
Pinning FCoE traffic to a specific port of a port-channel	324
Sample FSB configuration on VLT network	326
Sample FC Switch configuration on VLT network	328
Sample FSB configuration on non-VLT network	330
Sample FC Switch configuration on non-VLT network	332
Multi-hop FIP-snooping bridge	333
Configuration notes	333
Configure multi-hop FSB	334
Verify multi-hop FSB configuration	340
Sample Multi-hop FSB configuration	341
Configuration guidelines	354
NPIV Proxy Gateway cascading	354
Support for untagged VLAN in FCoE	357
Rebalance FC sessions (NPG)	357
Load balancing after system reboot	357
NPG rebalance topology	357
NPG switch configurations	358
Example: Manual rebalance trigger	360
Equivalent RESTCONF request for the rebalancing CLIs	362
F_Port commands	362
fc alias	362
fc zone	363
fc zoneset	363
feature fc	363
member (alias)	364
member (zone)	364
member (zoneset)	365
show fc alias	365
show fc interface-area-id mapping	365
show fc ns switch	366
show fc zone	366
show fc zoneset	367
zone default-zone permit	368
zoneset activate	368
NPG commands	369
fc port-mode F	369
feature fc npg	369
show npg devices	370
F_Port and NPG commands	370
clear fc statistics	370
fcoe	371
fcoe delay fcf-adv	371
name	371
Re-balance the FC sessions	372
show npg uplink-interface	374
show npg node-interface	375
show fc statistics	376
show fc switch	377
show running-config vfabric	377
show vfabric	378
vfabric	378
vfabric (interface)	379
vlan	379
FIP-snooping commands	379
feature fip-snooping	380
fip-snooping enable	380
fip-snooping fc-map	380
fip-snooping port-mode	381
FCoE commands	381
clear fcoe database	381
clear fcoe statistics	382
fcoe-pinned-port	382
fcoe max-sessions-per-enodemac	382
fcoe priority-bits	383
lldp tlv-select dcbxp-appln fcoe	383
show fcoe enode	384
show fcoe fcf	384
show fcoe pinned-port	385
show fcoe sessions	385
show fcoe statistics	386
show fcoe system	386
show fcoe vlan	387

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839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1,000
1,001
1,002
1,003
1,004
1,005
1,006
1,007
1,008
1,009
1,010
1,011
1,012
1,013
1,014
1,015
1,016
1,017
1,018
1,019
1,020
1,021
1,022
1,023
1,024
1,025
1,026
1,027
1,028
1,029
1,030
1,031
1,032
1,033
1,034
1,035
1,036
1,037
1,038
1,039
1,040
1,041
1,042
1,043
1,044
1,045
1,046
1,047
1,048
1,049
1,050
1,051
1,052
1,053
1,054
1,055
1,056
1,057
1,058
1,059
1,060
1,061
1,062
1,063
1,064
1,065
1,066
1,067
1,068
1,069
1,070
1,071
1,072
1,073
1,074
1,075
1,076
1,077
1,078
1,079
1,080
1,081
1,082
1,083
1,084
1,085
1,086
1,087
1,088
1,089
1,090
1,091
1,092
1,093
1,094
1,095
1,096
1,097
1,098
1,099
1,100
1,101
1,102
1,103
1,104
1,105
1,106
1,107
1,108
1,109
1,110
1,111
1,112
1,113
1,114
1,115
1,116
1,117
1,118
1,119
1,120
1,121
1,122
1,123
1,124
1,125
1,126
1,127
1,128
1,129
1,130
1,131
1,132
1,133
1,134
1,135
1,136
1,137
1,138
1,139
1,140
1,141
1,142
1,143
1,144
1,145
1,146
1,147
1,148
1,149
1,150
1,151
1,152
1,153
1,154
1,155
1,156
1,157
1,158
1,159
1,160
1,161
1,162
1,163
1,164
1,165
1,166
1,167
1,168
1,169
1,170
1,171
1,172
1,173
1,174
1,175
1,176
1,177
1,178
1,179
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
1,252
1,253
1,254
1,255
1,256
1,257
1,258
1,259
1,260
1,261
1,262
1,263
1,264
1,265
1,266
1,267
1,268
1,269
1,270
1,271
1,272
1,273
1,274
1,275
1,276
1,277
1,278
1,279
1,280
1,281
1,282
1,283
1,284
1,285
1,286
1,287
1,288
1,289
1,290
1,291
1,292
1,293
1,294
1,295
1,296
1,297
1,298
1,299
1,300
1,301
1,302
1,303
1,304
1,305
1,306
1,307
1,308
1,309
1,310
1,311
1,312
1,313
1,314
1,315
1,316
1,317
1,318
1,319
1,320
1,321
1,322
1,323
1,324
1,325
1,326
1,327
1,328
1,329
1,330
1,331
1,332
1,333
1,334
1,335
1,336
1,337
1,338
1,339
1,340
1,341
1,342
1,343
1,344
1,345
1,346
1,347
1,348
1,349
1,350
1,351
1,352
1,353
1,354
1,355
1,356
1,357
1,358
1,359
1,360
1,361
1,362
1,363
1,364
1,365
1,366
1,367
1,368
1,369
1,370
1,371
1,372
1,373
1,374
1,375
1,376
1,377
1,378
1,379
1,380
1,381
1,382
1,383
1,384
1,385
1,386
1,387
1,388
1,389
1,390
1,391
1,392
1,393
1,394
1,395
1,396
1,397
1,398
1,399
1,400
1,401
1,402
1,403
1,404
1,405

Match case Limit results 1 per page

ethernet1/1/8

128.288

128

200000000 FWD

32769

0000.0000.0000

128.288

ethernet1/1/9

128.292

128

200000000 FWD

32769

0000.0000.0000

128.292

ethernet1/1/10

128.296

128

200000000 FWD

32769

0000.0000.0000

128.296

ethernet1/1/11

128.300

128

200000000 FWD

32769

0000.0000.0000

128.300

ethernet1/1/12

128.304

128

200000000 FWD

32769

0000.0000.0000

128.304

ethernet1/1/13

128.308

128

200000000 FWD

32769

0000.0000.0000

128.308

ethernet1/1/14

128.312

128

200000000 FWD

32769

0000.0000.0000

128.312

ethernet1/1/15

128.316

128

200000000 FWD

32769

0000.0000.0000

128.316

ethernet1/1/16

128.320

128

200000000 FWD

32769

0000.0000.0000

128.320

ethernet1/1/17

128.324

128

200000000 FWD

32769

0000.0000.0000

128.324

ethernet1/1/18

128.328

128

200000000 FWD

32769

0000.0000.0000

128.328

ethernet1/1/19

128.332

128

200000000 FWD

32769

0000.0000.0000

128.332

ethernet1/1/20

128.336

128

200000000 FWD

32769

0000.0000.0000

128.336

ethernet1/1/21

128.340

128

200000000 FWD

32769

0000.0000.0000

128.340

ethernet1/1/22

128.344

128

200000000 FWD

32769

0000.0000.0000

128.344

ethernet1/1/23

128.348

128

200000000 FWD

32769

0000.0000.0000

128.348

ethernet1/1/24

128.352

128

200000000 FWD

32769

0000.0000.0000

128.352

ethernet1/1/25

128.356

128

200000000 FWD

32769

0000.0000.0000

128.356

ethernet1/1/26

128.360

128

200000000 FWD

32769

0000.0000.0000

128.360

ethernet1/1/27

128.364

128

200000000 FWD

32769

0000.0000.0000

128.364

ethernet1/1/28

128.368

128

200000000 FWD

32769

0000.0000.0000

128.368

ethernet1/1/29

128.372

128

200000000 FWD

32769

0000.0000.0000

128.372

ethernet1/1/30

128.376

128

200000000 FWD

32769

0000.0000.0000

128.376

ethernet1/1/31

128.380

128

200000000 FWD

32769

0000.0000.0000

128.380

ethernet1/1/32

128.384

128

200000000 FWD

32769

0000.0000.0000

128.384

Interface

Name

Role

PortID

Prio

Cost

Sts

Cost Link-type Edge

-----------------------------------------------------------------------

ethernet1/1/1

Disb

128.260

128

200000000 FWD

AUTO

ethernet1/1/2

Disb

128.264

128

200000000 FWD

AUTO

ethernet1/1/3

Disb

128.268

128

200000000 FWD

AUTO

ethernet1/1/4

Disb

128.272

128

200000000 FWD

AUTO

ethernet1/1/5

Desg

128.276

128

500

FWD

AUTO

ethernet1/1/6

Desg

128.280

128

500

FWD

AUTO

ethernet1/1/7

Disb

128.284

128

200000000 FWD

AUTO

ethernet1/1/8

Disb

128.288

128

200000000 FWD

AUTO

ethernet1/1/9

Disb

128.292

128

200000000 FWD

AUTO

ethernet1/1/10

Disb

128.296

128

200000000 FWD

AUTO

ethernet1/1/11

Disb

128.300

128

200000000 FWD

AUTO

Root assignment

Rapid-PVST assigns the root bridge according to the lowest bridge ID. Primary configuration assigns 24576 as the bridge priority whereas

secondary configuration assigns 28672 as the bridge priority.

spanning-tree vlan

vlan-id

root primary

command ensures that the switch has the lowest bridge priority value by setting

the predefined value of 24,576. If an alternate root bridge is required, use the

spanning-tree vlan

vlan-id

root secondary

command. The command sets the priority for the switch to the predefined value of 28,672. If the primary root bridge fails, the command

ensures that the alternate switch becomes the root bridge. It also assumes that the other switches in the network have a defined default

priority value of 32,768.

•

Configure the device as the root or secondary root in CONFIGURATION mode.

spanning-tree vlan

vlan-id

root {primary | secondary}

○

vlan-id

— Enter the VLAN ID number, from 1 to 4093.

○

primary

— Enter the bridge as primary or root bridge. The primary bridge value is 24576.

○

secondary

— Enter the bridge as the secondary root bridge. The secondary bridge value is 28672.

Configure root bridge as primary

OS10(config)# spanning-tree vlan 1 root primary

Verify root bridge information

OS10# show spanning-tree active

Spanning tree enabled protocol rapid-pvst with force-version rstp

VLAN 1

Executing IEEE compatible Spanning Tree Protocol

468

Layer 2