VPC configuration of Nexus Switches

VPC configuration of Nexus

Enable udld and lacp

NX_SW01(config)#feature udld

NX_SW01(config)#feature lacp

NX_SW01(config)# inter ethernet 1/3, ethernet 2/3    select ports

NX_SW01 (config-if-range)# description VPC Peer Link   vpc peer link
NX_SW01 (config-if-range)# switchport
NX_SW01 (config-if-range)# switchport mode trunk
NX_SW01 (config-if-range)# spanning-tree port type network
NX_SW01 (config-if-range)# rate-mode dedicated
NX_SW01 (config-if-range)# udld aggressive
NX_SW01 (config-if-range)# channel-group 1 mode active
NX_SW01 (config-if-range)# no shut

NX_SW01 (config-if-range)#exit

Secondary Switch

NX_SW02(config)#feature udld

NX_SW02(config)#feature lacp

Set up vpc peer link

NX_SW02(config)# inter ethernet 1/3, ethernet 2/3    select ports

NX_SW02 (config-if-range)# description VPC Peer Link   vpc peer link
NX_SW02 (config-if-range)# switchport
NX_SW02 (config-if-range)# switchport mode trunk
NX_SW02 (config-if-range)# spanning-tree port type network
NX_SW02 (config-if-range)# rate-mode dedicated
NX_SW02 (config-if-range)# udld aggressive
NX_SW02 (config-if-range)# channel-group 1 mode active
NX_SW02 (config-if-range)# no shut

NX_SW02(config-if-range)#exit

Primary SW01 as primary of even vlans

NX_SW01 (config)# spanning-tree vlan  200,202,204,206,208,210 root primary

NX-SW01 (config)# spanning-tree vlan 201,203,205,207,209,211 root secondary

SW02 as Primary for odd VLAN

NX-SW02 (config)# spanning-tree vlan 201,203,205,207,209,211 root primary

NX_SW02 (config)# spanning-tree vlan  200,202,204,206,208,210 root secondary

Primary switch

vpc domain 1

  peer-switch

  role priority 1024

  system-priority 4096   >>>> same in both primary and secondary switches

  peer-keepalive destination 10.10.10.2 source 10.10.10.1

delay restore 45

  peer-gateway

  auto-recovery

  ip arp synchronize

Secondary Switch

vpc domain 1

  peer-switch

  role priority 2048  >>higher number

  system-priority 4096 >>>> same in both primary and secondary switches

  peer-keepalive destination 10.10.10.1 source 10.10.10.1

  delay restore 45

  peer-gateway

  auto-recovery

  ip arp synchronize

Check the vpc status

Sh vpc br

Sh vpc peer-keepalive

Create port channel for peer link

Primary Sw01

Int po 1

Switchport

Switchport mode trunk

spanning-tree port type network

  vpc peer-link

Secondary Sw02

Int po 1

Switchport

Switchport mode trunk

spanning-tree port type network

  vpc peer-link

It is a good idea keep vpc peer link in different vrf

Create new vrf

NX_SW01 (config)# vrf context VPC_KEEPALIVE

NX_SW01 (config)# interface ethernet 1/3, ethernet 2/3
NX_SW01 (config-if-range)# channel-group 1 mode active
NX_SW01 (config-if-range)# udld enable
NX_SW01 (config-if-range)# description VPC Peer-keepalive link
NX_SW01 (config-if-range)# no shut

Nx_sw02

NX_SW02 (config)# vrf context VPC_KEEPALIVE

NX_SW02 (config)# interface ethernet 1/3, ethernet 2/3
NX_SW02 (config-if-range)# channel-group 1 mode active
NX_SW02 (config-if-range)# udld enable
NX_SW02 (config-if-range)# description VPC Peer-keepalive link
NX_SW02 (config-if-range)# no shut

NX_SW01 (config-if-range)# inter port 1
NX_SW01 (config-if)# vrf member VPC_KEEPALIVE
NX_SW01 (config-if)# ip address 10.10.10.1/30
NX_SW01 (config-if)# no shut

Nexus2 (config-if-range)# inter port 1
Nexus2 (config-if)# vrf member VPC_KEEPALIVE
Nexus2 (config-if)# ip address 10.10.10.2/30
Nexus2 (config-if)# no shut

Vlan conf

Vlan 20

  no ip redirects

  ip address x.x.x.x/24

  no ipv6 redirects

 

  hsrp version 2

  hsrp 0

        preempt delay minimum 90 reload 120

    priority 120

    timers msec 300 msec 900

    ip x.x.x.1

int po 20

switchport
switchport mode trunk
vpc 20

Trunk to another switch

interface port-channel19

  switchport

  switchport mode trunk

  vpc 19

interface Ethernet1/5

  switchport

  switchport mode trunk

  channel-group 19 mode active

  no shutdown

Trunk to Host Server like UCS

interface Ethernet1/8

  

  switchport mode trunk

  channel-group 31 mode active

interface port-channel31

    switchport mode trunk

  vpc 31

Access Port

interface port-channel 32

 

  vpc 32

  switchport access vlan 205

  spanning-tree port type edge

interface Ethernet1/32

  switchport access vlan 205

  channel-group 32 mode active

Secondary switch

interface port-channel32

  vpc 32

  switchport access vlan 205

  spanning-tree port type edge

interface Ethernet1/32

 

  switchport access vlan 205

  channel-group 32 mode active