一、实验拓扑：

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由于条件有限，使用两个N5K做基本的vPC实验，Peer Keepalive Link使用的是两个Nexus 5K的Mgm0接口。

二、配置步骤：

1、先构建vPC domain，并在domain下定义role优先级、system优先级、PKL。

2、然后配置Port-channel作为PL。

3、配置vPC成员端口，配置vPC。

4、配置Catalyst4500X交换机的Port-channel。

N5K-1

hostname N5K-1

feature telnet

feature interface-vlan

feature lacp

feature vpc

vlan 1, 10

vrf context management

vpc domain 10  

  peer-switch >>>>对于其他的SW，看到的是同一个MAC地址？

  role priority 100  >>>这个值需要不同，小的成为Primary，大的成为Secondary，如果一样，小的MAC成为Primary

  system-priority 2100 >>>这个值在同一个domain需要配置为一致

  peer-keepalive destination 172.16.1.2 source 172.16.1.1

  delay restore 150

interface Vlan10

  no shutdown

  ip address 10.1.1.1/24

interface port-channel10

  switchport mode trunk

  switchport trunk allowed vlan 1,10

  spanning-tree port type network

  speed 10000

  vpc peer-link

interface port-channel20

  switchport mode trunk

  vpc 20

interface Ethernet1/1

  switchport mode trunk

  switchport trunk allowed vlan 1,10

  channel-group 10 mode active

interface Ethernet1/5

  switchport mode trunk

  switchport trunk allowed vlan 1,10

  channel-group 10 mode active

interface Ethernet1/9

  switchport mode trunk

 speed auto

  channel-group 20 mode active

interface mgmt0

  vrf member management

  ip address 172.16.1.1/24

N5K-2

hostname N5K-2

feature telnet

feature interface-vlan

feature lacp

feature vpc

vlan 1, 10

vrf context management

vpc domain 10 

  peer-switch

  role priority 101

  system-priority 2100

  peer-keepalive destination 172.16.1.2 source 172.16.1.1

  delay restore 150

interface Vlan10

  no shutdown

  ip address 10.1.1.1/24

interface port-channel10

  switchport mode trunk

  switchport trunk allowed vlan 1,10

  spanning-tree port type network

  speed 10000

  vpc peer-link

interface port-channel20

  switchport mode trunk

  vpc 20

interface Ethernet1/1

  switchport mode trunk

  switchport trunk allowed vlan 1,10

  channel-group 10 mode active

interface Ethernet1/5

  switchport mode trunk

  switchport trunk allowed vlan 1,10

  channel-group 10 mode active

interface Ethernet1/9

  switchport mode trunk

  speed auto

  channel-group 20 mode active

interface mgmt0

  vrf member management

  ip address 172.16.1.1/24

C4500-X

vlan 1,10

interface vlan10

  ip address 10.1.1.3 255.255.255.0

interface range tenGigabitEthernet 1/1， tenGigabitEthernet1/3

  channel-group 20 mode active

interface Port-channel 20

  switch mode trunk

  vpc 20

N5K-1# sho int brief

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

Ethernet      VLAN    Type Mode   Status  Reason                   Speed     Por

t

Interface                                                                    Ch

#

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

Eth2/1        1       eth  access up      none                        10G(D) --

Eth2/2        1       eth  access down    SFP not inserted            10G(D) --

Eth2/3        1       eth  access down    SFP not inserted            10G(D) --

Eth2/4        1       eth  access down    SFP not inserted            10G(D) --

Eth2/5        1       eth  access up      none                        10G(D) --

Eth2/6        1       eth  access down    SFP not inserted            10G(D) --

Eth2/7        1       eth  access down    SFP not inserted            10G(D) --

Eth2/8        1       eth  access down    SFP not inserted            10G(D) --

Eth2/9        1       eth  fabric up      none                        10G(D) -- >>>>如要配置FEX，该接口的模式为switchport mode fex-fabric

Eth2/10       1       eth  access down    SFP not inserted            10G(D) --

Eth2/11       1       eth  access down    SFP not inserted            10G(D) --

Eth2/12       1       eth  access down    SFP not inserted            10G(D) --

Eth2/13       1       eth  access down    SFP not inserted            10G(D) --

Eth2/14       1       eth  access down    SFP not inserted            10G(D) --

Eth2/15       1       eth  access down    SFP not inserted            10G(D) --

Eth2/16       1       eth  access down    SFP not inserted            10G(D) --

Eth2/17       1       eth  access down    SFP not inserted            10G(D) --

Eth2/18       1       eth  access down    SFP not inserted            10G(D) --

Eth2/19       1       eth  access down    SFP not inserted            10G(D) --

Eth2/20       1       eth  access down    SFP not inserted            10G(D) --

Eth2/21       1       eth  access down    SFP not inserted            10G(D) --

Eth2/22       1       eth  access down    SFP not inserted            10G(D) --

Eth2/23       1       eth  access down    SFP not inserted            10G(D) --

Eth2/24       1       eth  access down    SFP not inserted            10G(D) --

Eth2/25       1       eth  access down    SFP not inserted            10G(D) --

Eth2/26       1       eth  access down    SFP not inserted            10G(D) --

Eth2/27       1       eth  access down    SFP not inserted            10G(D) --

Eth2/28       1       eth  access down    SFP not inserted            10G(D) --

Eth2/29       1       eth  access down    SFP not inserted            10G(D) --

Eth2/30       1       eth  access down    SFP not inserted            10G(D) --

Eth2/31       1       eth  access down    SFP not inserted            10G(D) --

Eth2/32       1       eth  access down    SFP not inserted            10G(D) --

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

Port   VRF          Status IP Address                              Speed    MTU

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

mgmt0  --           up     172.16.1.1                              1000     1500

刚配置了PL的时候：

N5K-1# sho vpc

Legend:

                (*) - local vPC is down, forwarding via vPC peer-link

vPC domain id                     : 10 

Peer status                       : peer adjacency formed ok     

vPC keep-alive status             : peer is alive                

Configuration consistency status  : success

Per-vlan consistency status       : success                      

Type-2 consistency status         : success

vPC role                          : primary                      

Number of vPCs configured         : 0  

Peer Gateway                      : Disabled

Dual-active excluded VLANs        : -

Graceful Consistency Check        : Enabled

Auto-recovery status              : Enabled (timeout = 240 seconds)

vPC Peer-link status

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

id   Port   Status Active vlans   

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

1    Po10   up     1,10         

配置了连接C4500-X的vPC的时候

N5K-1# show vpc

Legend:

                (*) - local vPC is down, forwarding via vPC peer-link

vPC domain id                     : 10 

Peer status                       : peer adjacency formed ok     

vPC keep-alive status             : peer is alive                

Configuration consistency status  : success

Per-vlan consistency status       : success                      

Type-2 consistency status         : success

vPC role                          : primary                      

Number of vPCs configured         : 1  

Peer Gateway                      : Disabled

Dual-active excluded VLANs        : -

Graceful Consistency Check        : Enabled

Auto-recovery status              : Enabled (timeout = 240 seconds)

vPC Peer-link status

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

id   Port   Status Active vlans   

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

1    Po10   up     1,10                                                     

vPC status

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

id     Port        Status Consistency Reason                     Active vlans

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

20     Po20        up     success     success                    1,10  

查看一致性参数

N5K-1# show vpc consistency-parameters interface port-channel 10

Note: **** Global type-1 parameters will be displayed for peer-link *****

    Legend:

        Type 1 : vPC will be suspended in case of mismatch

Name                        Type  Local Value            Peer Value            

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

QoS                         2     ([], [], [], [], [],   ([], [], [], [], [], 

                                  [])                    [])                  

Network QoS (MTU)           2     (1538, 0, 0, 0, 0, 0)  (1538, 0, 0, 0, 0, 0)

Network Qos (Pause)         2     (F, F, F, F, F, F)     (F, F, F, F, F, F)   

Input Queuing (Bandwidth)   2     (100, 0, 0, 0, 0, 0)   (100, 0, 0, 0, 0, 0) 

Input Queuing (Absolute     2     (F, F, F, F, F, F)     (F, F, F, F, F, F)   

Priority)                                                                     

Output Queuing (Bandwidth)  2     (100, 0, 0, 0, 0, 0)   (100, 0, 0, 0, 0, 0) 

Output Queuing (Absolute    2     (F, F, F, F, F, F)     (F, F, F, F, F, F)   

Priority)                                                                     

STP Mode                    1     Rapid-PVST             Rapid-PVST           

STP Disabled                1     None                   None                 

STP MST Region Name         1     ""                     ""                   

STP MST Region Revision     1     0                      0                    

STP MST Region Instance to  1                                                 

 VLAN Mapping                                                                 

STP Loopguard               1     Disabled               Disabled             

STP Bridge Assurance        1     Enabled                Enabled              

STP Port Type, Edge         1     Normal, Disabled,      Normal, Disabled,    

BPDUFilter, Edge BPDUGuard        Disabled               Disabled             

STP MST Simulate PVST       1     Enabled                Enabled              

Interface-vlan admin up     2     10                     10                   

Interface-vlan routing      2     1,10                   1,10                 

capability                                                                    

IGMP Snooping Group-Limit   2     4000                   4000                 

Allowed VLANs               -     1,10                   1,10                 

Local suspended VLANs       -     -                      -