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BGP & MLAG

Introduction

This lab uses a spine-leaf topology and configures the following:

  • BGP unnumbered on spines and leafs
  • MLAG between leaf pairs
  • AlmaLinux with LACP bonding

Topology

The following topology is used:

Pasted image 20240219121202.png

Configuration

Interfaces 
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nv set interface lo ip address 10.10.10.1/32
nv set interface swp1,swp10-11,swp23-24
nv set interface bond1 bond member swp1
nv set interface bond1 bond mlag id 1
nv set interface bond1 bridge domain br_default

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nv set interface lo ip address 10.10.10.2/32
nv set interface swp1,swp10-11,swp23-24
nv set interface bond1 bond member swp1
nv set interface bond1 bond mlag id 1
nv set interface bond1 bridge domain br_default

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nv set interface lo ip address 10.10.10.3/32
nv set interface swp1,swp10-11,swp23-24
nv set interface bond1 bond member swp1
nv set interface bond1 bond mlag id 1
nv set interface bond1 bridge domain br_default

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nv set interface lo ip address 10.10.10.4/32
nv set interface swp1,swp10-11,swp23-24
nv set interface bond1 bond member swp1
nv set interface bond1 bond mlag id 1
nv set interface bond1 bridge domain br_default

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nv set interface lo ip address 10.10.10.101/32
nv set interface swp1-4

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nv set interface lo ip address 10.10.10.102/32
nv set interface swp1-4
Peer links 
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nv set interface peerlink bond member swp10-11
nv set mlag mac-address 44:38:39:BE:EF:AA
nv set mlag backup 10.10.10.2
nv set mlag peer-ip linklocal

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nv set interface peerlink bond member swp10-11
nv set mlag mac-address 44:38:39:BE:EF:AA
nv set mlag backup 10.10.10.1
nv set mlag peer-ip linklocal

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nv set interface peerlink bond member swp10-11
nv set mlag mac-address 44:38:39:BE:EF:AA
nv set mlag backup 10.10.10.4
nv set mlag peer-ip linklocal

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nv set interface peerlink bond member swp10-11
nv set mlag mac-address 44:38:39:BE:EF:AA
nv set mlag backup 10.10.10.3
nv set mlag peer-ip linklocal
VLANs 
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nv set interface vlan10 ip address 10.1.10.2/24
nv set interface vlan10 ip vrr address 10.1.10.1/24
nv set interface vlan10 ip vrr state up
nv set interface vlan20 ip address 10.1.20.2/24
nv set interface vlan20 ip vrr address 10.1.20.1/24
nv set interface vlan20 ip vrr state up
nv set interface bond1 bridge domain br_default access 10
nv set bridge domain br_default vlan 10,20
nv set bridge domain br_default untagged 1

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nv set interface vlan10 ip address 10.1.10.3/24
nv set interface vlan10 ip vrr address 10.1.10.1/24
nv set interface vlan10 ip vrr state up
nv set interface vlan20 ip address 10.1.20.3/24
nv set interface vlan20 ip vrr address 10.1.20.1/24
nv set interface vlan20 ip vrr state up
nv set interface bond1 bridge domain br_default access 10
nv set bridge domain br_default vlan 10,20
nv set bridge domain br_default untagged 1

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nv set interface vlan30 ip address 10.1.30.2/24
nv set interface vlan30 ip vrr address 10.1.30.1/24
nv set interface vlan30 ip vrr state up
nv set interface vlan40 ip address 10.1.40.2/24
nv set interface vlan40 ip vrr address 10.1.40.1/24
nv set interface vlan40 ip vrr state up
nv set interface bond1 bridge domain br_default access 40
nv set bridge domain br_default vlan 30,40
nv set bridge domain br_default untagged 1

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nv set interface vlan30 ip address 10.1.30.3/24
nv set interface vlan30 ip vrr address 10.1.30.1/24
nv set interface vlan30 ip vrr state up
nv set interface vlan40 ip address 10.1.40.3/24
nv set interface vlan40 ip vrr address 10.1.40.1/24
nv set interface vlan40 ip vrr state up
nv set interface bond1 bridge domain br_default access 40
nv set bridge domain br_default vlan 30,40
nv set bridge domain br_default untagged 1
BGP 
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nv set router bgp autonomous-system 65101
nv set router bgp router-id 10.10.10.1
nv set vrf default router bgp neighbor swp24 remote-as external
nv set vrf default router bgp neighbor swp23 remote-as external
nv set vrf default router bgp address-family ipv4-unicast network 10.10.10.1/32
nv set vrf default router bgp address-family ipv4-unicast redistribute connected
nv config apply

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nv set router bgp autonomous-system 65102
nv set router bgp router-id 10.10.10.2
nv set vrf default router bgp neighbor swp24 remote-as external
nv set vrf default router bgp neighbor swp23 remote-as external
nv set vrf default router bgp address-family ipv4-unicast network 10.10.10.2/32
nv set vrf default router bgp address-family ipv4-unicast redistribute connected
nv config apply

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nv set router bgp autonomous-system 65103
nv set router bgp router-id 10.10.10.3
nv set vrf default router bgp neighbor swp24 remote-as external
nv set vrf default router bgp neighbor swp23 remote-as external
nv set vrf default router bgp address-family ipv4-unicast network 10.10.10.3/32
nv set vrf default router bgp address-family ipv4-unicast redistribute connected
nv config apply

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nv set router bgp autonomous-system 65104
nv set router bgp router-id 10.10.10.4
nv set vrf default router bgp neighbor swp24 remote-as external
nv set vrf default router bgp neighbor swp23 remote-as external
nv set vrf default router bgp address-family ipv4-unicast network 10.10.10.4/32
nv set vrf default router bgp address-family ipv4-unicast redistribute connected
nv config apply

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nv set router bgp autonomous-system 65199
nv set router bgp router-id 10.10.10.101
nv set vrf default router bgp neighbor swp1 remote-as external
nv set vrf default router bgp neighbor swp2 remote-as external
nv set vrf default router bgp neighbor swp3 remote-as external
nv set vrf default router bgp neighbor swp4 remote-as external
nv set vrf default router bgp address-family ipv4-unicast network 10.10.10.101/32
nv config apply

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nv set router bgp autonomous-system 65199
nv set router bgp router-id 10.10.10.102
nv set vrf default router bgp neighbor swp1 remote-as external
nv set vrf default router bgp neighbor swp2 remote-as external
nv set vrf default router bgp neighbor swp3 remote-as external
nv set vrf default router bgp neighbor swp4 remote-as external
nv set vrf default router bgp address-family ipv4-unicast network 10.10.10.102/32
nv config apply
Servers 
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nmcli con del "System eth0"
nmcli con del "Wired connection 1"
nmcli con add type bond ifname bond1 con-name bond1 bond.options "mode=802.3ad"
nmcli con add type ethernet ifname eth0 master bond1
nmcli con add type ethernet ifname eth1 master bond1
nmcli con modify bond1 ipv4.address 10.1.10.10/24   
nmcli con modify bond1 ipv4.gateway 10.1.10.1
nmcli con down bond1 && nmcli con up bond1

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nmcli con del "System eth0"
nmcli con del "Wired connection 1"
nmcli con add type bond ifname bond1 con-name bond1 bond.options "mode=802.3ad"
nmcli con add type ethernet ifname eth0 master bond1
nmcli con add type ethernet ifname eth1 master bond1
nmcli con modify bond1 ipv4.address 10.1.40.10/24   
nmcli con modify bond1 ipv4.gateway 10.1.40.1
nmcli con down bond1 && nmcli con up bond1