Dell EMC SmartFabric OS10 User Guide Release 10.5.0

Example - Three-tier CLOS topology with eBGP

This section provides a sample three-tier topology with external BGP.

Spine 1 configuration

1. Configure an IP address on leaf-facing interfaces.

   Spine1(config)# interface ethernet1/1/1
   Spine1(conf-if-eth1/1/1)# description Spine1-Leaf1
   Spine1(conf-if-eth1/1/1)# no switchport
   Spine1(conf-if-eth1/1/1)# mtu 9216
   Spine1(conf-if-eth1/1/1)# ip address 10.1.1.0/31
   Spine1(conf-if-eth1/1/1)# exit
   Spine1(config)# interface ethernet1/1/2
   Spine1(conf-if-eth1/1/2)# description Spine1-Leaf2
   Spine1(conf-if-eth1/1/2)# no switchport
   Spine1(conf-if-eth1/1/2)# mtu 9216
   Spine1(conf-if-eth1/1/2)# ip address 10.1.1.2/31
   Spine1(conf-if-eth1/1/2)# exit
   Spine1(config)# interface ethernet1/1/3
   Spine1(conf-if-eth1/1/3)# description Spine1-Leaf3
   Spine1(conf-if-eth1/1/3)# no switchport
   Spine1(conf-if-eth1/1/3)# mtu 9216
   Spine1(conf-if-eth1/1/3)# ip address 10.1.2.0/31
   Spine1(conf-if-eth1/1/3)# exit
   Spine1(config)# interface ethernet1/1/4
   Spine1(conf-if-eth1/1/4)# description Spine1-Leaf4
   Spine1(conf-if-eth1/1/4)# no switchport
   Spine1(conf-if-eth1/1/4)# mtu 9216
   Spine1(conf-if-eth1/1/4)# ip address 10.1.2.2/31
   Spine1(conf-if-eth1/1/4)# exit

2. Configure BGP neighbors. This example uses passive peering which simplifies neighbor configuration.

   Spine1(config)# router bgp 65101
   Spine1(config-router-bgp-65101)# router-id 10.0.0.1
   Spine1(config-router-bgp-65101)# template passive_v4_pod1
   Spine1(config-router-template)# remote-as 65201
   Spine1(config-router-template)# listen 10.1.1.0/24
   Spine1(config-router-template)# exit
   Spine1(config-router-bgp-65101)# template passive_v4_pod2
   Spine1(config-router-template)# remote-as 65202
   Spine1(config-router-template)# listen 10.1.2.0/24
   Spine1(config-router-template)# exit

Spine 2 configuration

1. Configure an IP address on leaf-facing interfaces.

   Spine2(config)# interface ethernet1/1/1
   Spine2(conf-if-eth1/1/1)# description Spine2-Leaf1
   Spine2(conf-if-eth1/1/1)# no switchport
   Spine2(conf-if-eth1/1/1)# mtu 9216
   Spine2(conf-if-eth1/1/1)# ip address 10.2.1.0/31
   Spine2(conf-if-eth1/1/1)# exit
   Spine2(config)# interface ethernet1/1/2
   Spine2(conf-if-eth1/1/2)# description Spine2-Leaf2
   Spine2(conf-if-eth1/1/2)# no switchport
   Spine2(conf-if-eth1/1/2)# mtu 9216
   Spine2(conf-if-eth1/1/2)# ip address 10.2.1.2/31
   Spine2(conf-if-eth1/1/2)# exit
   Spine2(config)# interface ethernet1/1/3
   Spine2(conf-if-eth1/1/3)# description Spine2-Leaf3
   Spine2(conf-if-eth1/1/3)# no switchport
   Spine2(conf-if-eth1/1/3)# mtu 9216
   Spine2(conf-if-eth1/1/3)# ip address 10.2.2.0/31
   Spine2(conf-if-eth1/1/3)# exit
   Spine2(config)# interface ethernet1/1/4
   Spine2(conf-if-eth1/1/4)# description Spine2-Leaf4
   Spine2(conf-if-eth1/1/4)# no switchport
   Spine2(conf-if-eth1/1/4)# mtu 9216
   Spine2(conf-if-eth1/1/4)# ip address 10.2.2.2/31
   Spine2(conf-if-eth1/1/4)# exit

2. Configure BGP neighbors. This example uses passive peering which simplifies neighbor configuration.

   Spine2(config)# router bgp 65101
   Spine2(config-router-bgp-65101)# router-id 10.0.0.2
   Spine2(config-router-bgp-65101)# template passive_v4_pod1
   Spine2(config-router-template)# remote-as 65201
   Spine2(config-router-template)# listen 10.2.1.0/24
   Spine2(config-router-template)# exit
   Spine2(config-router-bgp-65101)# template passive_v4_pod2
   Spine2(config-router-template)# remote-as 65202
   Spine2(config-router-template)# listen 10.2.2.0/24
   Spine2(config-router-template)# exit

Leaf 1 configuration

1. Configure an IP address on spine-facing interfaces.

   Leaf1(config)# interface ethernet1/1/1
   Leaf1(conf-if-eth1/1/1)# description Leaf1-Spine1
   Leaf1(conf-if-eth1/1/1)# no switchport
   Leaf1(conf-if-eth1/1/1)# mtu 9216
   Leaf1(conf-if-eth1/1/1)# ip address 10.1.1.1/31
   Leaf1(conf-if-eth1/1/1)# exit
   Leaf1(config)# interface ethernet1/1/2
   Leaf1(conf-if-eth1/1/2)# description Leaf1-Spine2
   Leaf1(conf-if-eth1/1/2)# no switchport
   Leaf1(conf-if-eth1/1/2)# mtu 9216
   Leaf1(conf-if-eth1/1/2)# ip address 10.2.1.1/31
   Leaf1(conf-if-eth1/1/2)# exit

2. Configure an IP address on ToR facing interfaces.

   Leaf1(config)# interface ethernet1/1/3
   Leaf1(conf-if-eth1/1/1)# description Leaf1-ToR1
   Leaf1(conf-if-eth1/1/1)# no switchport
   Leaf1(conf-if-eth1/1/1)# mtu 9216
   Leaf1(conf-if-eth1/1/1)# ip address 10.3.1.0/31
   Leaf1(conf-if-eth1/1/1)# exit

3. Configure BGP neighbors.

   Leaf1(config)# router bgp 65201
   Leaf1(config-router-bgp-65201)# router-id 10.0.1.1
   Leaf1(config-router-bgp-65201)# neighbor 10.1.1.0
   Leaf1(config-router-neighbor)# remote-as 65101
   Leaf1(config-router-neighbor)# no shutdown
   Leaf1(config-router-neighbor)# exit
   Leaf1(config-router-bgp-65201)# neighbor 10.2.1.0
   Leaf1(config-router-neighbor)# remote-as 65101
   Leaf1(config-router-neighbor)# no shutdown
   Leaf1(config-router-neighbor)# exit
   Leaf1(config-router-bgp-65201)# neighbor 10.3.1.1
   Leaf1(config-router-neighbor)# remote-as 65301
   Leaf1(config-router-neighbor)# no shutdown
   Leaf1(config-router-neighbor)# exit
   

Leaf 2 configuration

1. Configure an IP address on spine-facing interfaces.

   Leaf2(config)# interface ethernet1/1/1
   Leaf2(conf-if-eth1/1/1)# description Leaf2-Spine1
   Leaf2(conf-if-eth1/1/1)# no switchport
   Leaf2(conf-if-eth1/1/1)# mtu 9216
   Leaf2(conf-if-eth1/1/1)# ip address 10.1.1.3/31
   Leaf2(conf-if-eth1/1/1)# exit
   Leaf2(config)# interface ethernet1/1/2
   Leaf2(conf-if-eth1/1/2)# description Leaf2-Spine2
   Leaf2(conf-if-eth1/1/2)# no switchport
   Leaf2(conf-if-eth1/1/2)# mtu 9216
   Leaf2(conf-if-eth1/1/2)# ip address 10.2.1.3/31
   Leaf2(conf-if-eth1/1/2)# exit

2. Configure an IP address on ToR-facing interfaces.

   Leaf2(config)# interface ethernet1/1/3
   Leaf2(conf-if-eth1/1/1)# description Leaf2-ToR1
   Leaf2(conf-if-eth1/1/1)# no switchport
   Leaf2(conf-if-eth1/1/1)# mtu 9216
   Leaf2(conf-if-eth1/1/1)# ip address 10.4.1.0/31
   Leaf2(conf-if-eth1/1/1)# exit

3. Configure BGP neighbors.

   Leaf2(config)# router bgp 65201
   Leaf2(config-router-bgp-65201)# router-id 10.0.1.2
   Leaf2(config-router-bgp-65201)# neighbor 10.1.1.2
   Leaf2(config-router-neighbor)# remote-as 65101
   Leaf2(config-router-neighbor)# no shutdown
   Leaf2(config-router-neighbor)# exit
   Leaf2(config-router-bgp-65201)# neighbor 10.2.1.2
   Leaf2(config-router-neighbor)# remote-as 65101
   Leaf2(config-router-neighbor)# no shutdown
   Leaf2(config-router-neighbor)# exit
   Leaf2(config-router-bgp-65201)# neighbor 10.4.1.1
   Leaf2(config-router-neighbor)# remote-as 65301
   Leaf2(config-router-neighbor)# no shutdown
   Leaf2(config-router-neighbor)# exit

Leaf 3 configuration

1. Configure an IP address on spine-facing interfaces.

   Leaf3(config)# interface ethernet1/1/1
   Leaf3(conf-if-eth1/1/1)# description Leaf3-Spine1
   Leaf3(conf-if-eth1/1/1)# no switchport
   Leaf3(conf-if-eth1/1/1)# mtu 9216
   Leaf3(conf-if-eth1/1/1)# ip address 10.1.2.1/31
   Leaf3(conf-if-eth1/1/1)# exit
   Leaf3(config)# interface ethernet1/1/2
   Leaf3(conf-if-eth1/1/2)# description Leaf3-Spine2
   Leaf3(conf-if-eth1/1/2)# no switchport
   Leaf3(conf-if-eth1/1/2)# mtu 9216
   Leaf3(conf-if-eth1/1/2)# ip address 10.2.2.1/31
   Leaf3(conf-if-eth1/1/2)# exit

2. Configure an IP address on ToR-facing interfaces.

   Leaf3(config)# interface ethernet1/1/3
   Leaf3(conf-if-eth1/1/3)# description Leaf3-ToR2
   Leaf3(conf-if-eth1/1/3)# no switchport
   Leaf3(conf-if-eth1/1/3)# mtu 9216
   Leaf3(conf-if-eth1/1/3)# ip address 10.5.1.0/31
   Leaf3(conf-if-eth1/1/3)# exit

3. Configure BGP neighbors.

   Leaf3(config)# router bgp 65202
   Leaf3(config-router-bgp-65202)# router-id 10.0.1.3
   Leaf3(config-router-bgp-65202)# neighbor 10.1.2.0
   Leaf3(config-router-neighbor)# remote-as 65101
   Leaf3(config-router-neighbor)# no shutdown
   Leaf3(config-router-neighbor)# exit
   Leaf3(config-router-bgp-65202)# neighbor 10.2.2.0
   Leaf3(config-router-neighbor)# remote-as 65101
   Leaf3(config-router-neighbor)# no shutdown
   Leaf3(config-router-neighbor)# exit
   Leaf3(config-router-bgp-65202)# neighbor 10.5.1.1
   Leaf3(config-router-neighbor)# remote-as 65302
   Leaf3(config-router-neighbor)# no shutdown
   Leaf3(config-router-neighbor)# exit

Leaf 4 configuration

1. Configure an IP address on spine-facing interfaces.

   Leaf4(config)# interface ethernet1/1/1
   Leaf4(conf-if-eth1/1/1)# description Leaf4-Spine1
   Leaf4(conf-if-eth1/1/1)# no switchport
   Leaf4(conf-if-eth1/1/1)# mtu 9216
   Leaf4(conf-if-eth1/1/1)# ip address 10.1.2.3/31
   Leaf4(conf-if-eth1/1/1)# exit
   Leaf4(config)# interface ethernet1/1/2
   Leaf4(conf-if-eth1/1/2)# description Leaf4-Spine2
   Leaf4(conf-if-eth1/1/2)# no switchport
   Leaf4(conf-if-eth1/1/2)# mtu 9216
   Leaf4(conf-if-eth1/1/2)# ip address 10.2.2.3/31
   Leaf4(conf-if-eth1/1/2)# exit

2. Configure an IP address on ToR-facing interfaces.

   Leaf4(config)# interface ethernet1/1/3
   Leaf4(conf-if-eth1/1/3)# description Leaf4-ToR2
   Leaf4(conf-if-eth1/1/3)# no switchport
   Leaf4(conf-if-eth1/1/3)# mtu 9216
   Leaf4(conf-if-eth1/1/3)# ip address 10.6.1.0/31
   Leaf4(conf-if-eth1/1/3)# exit

3. Configure BGP neighbors.

   Leaf4(config)# router bgp 65202
   Leaf4(config-router-bgp-65202)# router-id 10.0.1.4
   Leaf4(config-router-bgp-65202)# neighbor 10.1.2.2
   Leaf4(config-router-neighbor)# remote-as 65101
   Leaf4(config-router-neighbor)# no shutdown
   Leaf4(config-router-neighbor)# exit
   Leaf4(config-router-bgp-65202)# neighbor 10.2.2.2
   Leaf4(config-router-neighbor)# remote-as 65101
   Leaf4(config-router-neighbor)# no shutdown
   Leaf4(config-router-neighbor)# exit
   Leaf4(config-router-bgp-65202)# neighbor 10.6.1.1
   Leaf4(config-router-neighbor)# remote-as 65302
   Leaf4(config-router-neighbor)# no shutdown
   Leaf4(config-router-neighbor)# exit

ToR 1 configuration

1. Configure an IP address on leaf-facing interfaces.

   ToR1(config)# interface ethernet1/1/1
   ToR1(conf-if-eth1/1/1)# description ToR1-Leaf1
   ToR1(conf-if-eth1/1/1)# no switchport
   ToR1(conf-if-eth1/1/1)# mtu 9216
   ToR1(conf-if-eth1/1/1)# ip address 10.3.1.1/31
   ToR1(conf-if-eth1/1/1)# exit
   ToR1(config)# interface ethernet1/1/2
   ToR1(conf-if-eth1/1/2)# description ToR1-Leaf2
   ToR1(conf-if-eth1/1/2)# no switchport
   ToR1(conf-if-eth1/1/2)# mtu 9216
   ToR1(conf-if-eth1/1/2)# ip address 10.4.1.1/31
   ToR1(conf-if-eth1/1/2)# exit

2. Configure a VLAN interface and a VLAN member for the end hosts.

   ToR1(config)# interface vlan 1001
   ToR1(conf-if-vl-1001)# ip address 172.16.1.1/24
   ToR1(conf-if-vl-1001)# mtu 9216
   ToR1(conf-if-vl-1001)# exit
   ToR1(config)# interface ethernet1/1/3
   ToR1(conf-if-eth1/1/3)# description ToR1-Hosts
   ToR1(conf-if-eth1/1/3)# mtu 9216
   ToR1(conf-if-eth1/1/3)# switchport mode trunk
   ToR1(conf-if-eth1/1/3)# switchport trunk allowed vlan 1001
   ToR1(conf-if-eth1/1/3)# exit

3. Configure BGP neighbors, and advertise the host subnet.

   ToR1(config)# router bgp 65301
   ToR1(config-router-bgp-65301)# router-id 10.0.2.1
   ToR1(config-router-bgp-65301)# address-family ipv4 unicast
   ToR1(configure-router-bgpv4-af)# network 172.16.1.0/24
   ToR1(configure-router-bgpv4-af)# exit
   ToR1(config-router-bgp-65301)# neighbor 10.3.1.0
   ToR1(config-router-neighbor)# remote-as 65201
   ToR1(config-router-neighbor)# no shutdown
   ToR1(config-router-neighbor)# exit
   ToR1(config-router-bgp-65301)# neighbor 10.4.1.0
   ToR1(config-router-neighbor)# remote-as 65201
   ToR1(config-router-neighbor)# no shutdown
   ToR1(config-router-neighbor)# exit

ToR 2 configuration

1. Configure an IP address on leaf-facing interfaces.

   ToR2(config)# interface ethernet1/1/1
   ToR2(conf-if-eth1/1/1)# description ToR2-Leaf3
   ToR2(conf-if-eth1/1/1)# no switchport
   ToR2(conf-if-eth1/1/1)# mtu 9216
   ToR2(conf-if-eth1/1/1)# ip address 10.5.1.1/31
   ToR2(conf-if-eth1/1/1)# exit
   ToR2(config)# interface ethernet1/1/2
   ToR2(conf-if-eth1/1/2)# description ToR2-Leaf4
   ToR2(conf-if-eth1/1/2)# no switchport
   ToR2(conf-if-eth1/1/2)# mtu 9216
   ToR2(conf-if-eth1/1/2)# ip address 10.6.1.1/31
   ToR2(conf-if-eth1/1/2)# exit

2. Configure a VLAN interface and a VLAN member for end devices.

   ToR2(config)# interface vlan 2001
   ToR2(conf-if-vl-2001)# ip address 172.16.2.1/24
   ToR2(conf-if-vl-2001)# mtu 9216
   ToR2(conf-if-vl-2001)# exit
   ToR2(config)# interface ethernet1/1/3
   ToR2(conf-if-eth1/1/3)# description ToR2-Hosts
   ToR2(conf-if-eth1/1/3)# mtu 9216
   ToR2(conf-if-eth1/1/3)# switchport mode trunk
   ToR2(conf-if-eth1/1/3)# switchport trunk allowed vlan 2001
   ToR2(conf-if-eth1/1/3)# exit

3. Configure BGP neighbors, and advertise the host subnet.

   ToR2(config)# router bgp 65302
   ToR2(config-router-bgp-65302)# router-id 10.0.2.2
   ToR2(config-router-bgp-65302)# address-family ipv4 unicast
   ToR2(configure-router-bgpv4-af)# network 172.16.2.0/24
   ToR2(configure-router-bgpv4-af)# exit
   ToR2(config-router-bgp-65302)# neighbor 10.5.1.0
   ToR2(config-router-neighbor)# remote-as 65202
   ToR2(config-router-neighbor)# no shutdown
   ToR2(config-router-neighbor)# exit
   ToR2(config-router-bgp-65302)# neighbor 10.6.1.0
   ToR2(config-router-neighbor)# remote-as 65202
   ToR2(config-router-neighbor)# no shutdown
   ToR2(config-router-neighbor)# exit