vPC quick queston

[blackmetal]

i have 2x 3064PQ and connect both QSFP together and create vpc over this QSP connection (i have a lacp from n3k-1 qsfp 1&2 to n3k-2 qsfp1-2)

and here is vpc config for n3k-1 :

vpc domain 1
peer-switch
role priority 20
system-priority 120
peer-keepalive destination 172.x.x.111 source 172.x.x.110
peer-gateway
auto-recovery

interface port-channel20
speed 40000
description VPC-LINK
switchport mode trunk
switchport trunk allowed vlan 802,1609
spanning-tree port type network
vpc peer-link
and here is n3k-2 vpc config :

vpc domain 1
peer-switch
role priority 30
system-priority 120
peer-keepalive destination 172.x.x.110 source 172.x.x.111
peer-gateway
auto-recovery

interface port-channel20
speed 40000
description VPC-LINK
switchport mode trunk
switchport trunk allowed vlan 802,1609
spanning-tree port type network
vpc peer-link
and on both n3k i have bgp session with same upstream router and i am announcing 85.185.x.x/24 with no prepend and equal cost/path to my upstream router, i want to achieve load balancing and some flows enter my network from n3k-1 and some of them enter from n3k-2 ,

so do i config my switches correctly? does l2/l3 packet working perfectly in this senario ?

and at last my both nexus have 2x 10g LACP with my access switches (which my Top of rack switches are connected to them) and my vlans are permiited on both uplinks,

Thank you.

[balaji.bandi]

EDIT :

i would suggest below model rather using vPC peerlink for Peering.

https://www.cisco.com/c/en/us/support/docs/ip/ip-routing/118997-technote-nexus-00.html

[blackmetal]

just updated.

[blackmetal]

?

[Christopher Hart]

Hello!

A quick clarifying question - Do both Nexus 3064PQs have a Layer 3 link to the upstream router? Or is the upstream router connected via vPC? The former is supported without any additional configuration. However, the latter requires layer3 peer-router configuration to be present under the vPC domain of both vPC peers in order to be supported.

With this setup, you should be able to achieve load balancing between both Nexus 3064PQ switches for both south-to-north traffic (L2 entering the Nexus via vPC and leaving via L3/BGP) and north-to-south traffic (L3/BGP traffic load-balanced between both Nexus 3064PQ switches by the upstream router through ECMP, assuming that the upstream router is configured for BGP Multipath.)

Thank you!

-Christopher

[blackmetal]

Both 3064pq has layer 3 uplink and i have seprate bgp session with my upstream on each 3064