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Cisco Cisco Nexus 5010 Switch Guia Do Desenho

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Design Guide 
© 2010 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. 
Page 31 of 38 
 
Dual Active Detected 
 
vPC Peer Link Status 
--------------------------------------------------------------------- 
id   Port   Status Active vLANs     
--   ----   ------ -------------------------------------------------- 
1    Po10   down   -                                                  
 
vPC status 
---------------------------------------------------------------------- 
id   Port   Status Consistency Reason                     Active vLANs 
--   ----   ------ ----------- -------------------------- ------------ 
51   Po51   down   success     success                    -      
 
The access switch uses the remaining link: 
tc-nexus5k01# show port channel summary 
-------------------------------------------------------------------------------- 
Group Port-       Type     Protocol  Member Ports 
      Channel 
-------------------------------------------------------------------------------- 
51    Po51(SU)    Eth      LACP      Eth2/1(P)    Eth2/2(D)   
The peer-keepalive communication helps ensure that the loss of the peer-link path does not introduce any unwanted 
flooding or split-subnet scenarios. 
Figure 21 shows the failure scenario in the presence of a fabric extender. The vPC operational secondary shuts down 
the vPC member port to host 1, which is directly attached to N5k01 and the vPC member port of host 2 connected to 
Cisco Nexus 2000 Series Fabric Extender N2k01.