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BGP ASNs and router IDs, Point-to-point IP networks

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4.1.1 BGP ASNs and router IDs Figure 9 shows the autonomous system numbers (ASNs) and router IDs used for the leaf and spine switches in this guide. Spine switches share a common ASN and each pair of leaf switches shares a common ASN. ASNs should follow a logical pattern for ease of administration and allow for growth as switches are added. Using private ASNs in the data center is a best practice. Private, 2-byte ASNs range from 64512 through 65534. In this example, 65101 is used on both switches at the spine layer. Leaf switches use ASNs with a "2" in the hundreds place, 65201 for example, and the last digit is used to uniquely identify the leaf pair. Additional spine switches would be assigned the existing ASN for the spine layer, 65101. Additional leaf switches would be added in pairs with the next pair assigned an ASN of 65204. The IP addresses shown are loopback addresses used as BGP router IDs and for BGP EVPN peering. Loopback addresses should follow a logical pattern to make it easier to manage and allow for growth. In this example, the 10.2.0.0/16 IP address space is used. The third octet in the address represents the layer, "1" for spine and "2" for leaf, and the fourth octet is the counter for the appropriate layer AS 65101 1S0p.i2n.e1.11 1S0p.2in.1e.2 4.1.2 10.2.2.1 VLTi 10.2.2.2 AS65201 10.2.2.3 VLTi 10.2.2.4 AS65202 BGP ASNs and router IDs 10.2.2.5 VLTi 10.2.2.6 AS65203 Point-to-point IP networks Establishing a logical, scalable IP address scheme is important before deploying a leaf-spine topology. The point-to-point links used in this deployment are labeled A-O in Figure 10. Spine 1 SSppiinnee22 A B C DE FG HI Leaf 1a VMLTi Leaf 1b Rack 1 Point-to-point networks Leaf 2a VNLTi Leaf 2b Rack 2 JK L Leaf 3a VOLTi Leaf 3b Rack n 13 Dell EMC Networking Virtualization Overlay with BGP EVPN

Section	Page
1 Introduction	6
1.1 Typographical conventions	6
1.2 Attachments	6
2 Hardware Overview	7
2.1 Dell EMC PowerSwitch S5248F-ON	7
2.2 Dell EMC PowerSwitch S4148U-ON	7
2.3 Dell EMC PowerSwitch Z9264F-ON	8
2.4 Dell EMC PowerSwitch S3048-ON	8
2.5 Dell EMC PowerEdge R740xd server	8
3 BGP EVPN VXLAN overview	9
3.1 The VXLAN protocol	10
3.2 BGP EVPN VXLAN operation	11
3.3 Integrated routing and bridging (IRB)	11
3.4 Anycast gateway	11
3.5 Indirect gateway	11
4 Topology	12
4.1 Leaf-spine underlay	12
4.1.1 BGP ASNs and router IDs	13
4.1.2 Point-to-point IP networks	13
4.2 Underlay network connections	15
4.3 BGP EVPN VXLAN overlay	16
4.4 OOB management network connections	17
5 Switch preparation	19
5.1 Check switch OS version	19
5.2 Verify license installation	19
5.3 Factory default configuration	20
5.4 Configure switch port profile (S4148U-ON only)	20
6 Configure leaf switches	21
6.1 Initial configuration settings	21
6.2 VLT configuration	22
6.3 Virtual network configuration	22
6.4 VLAN configuration	24
6.5 Downstream interface configuration	25
6.6 Upstream interface configuration	26
6.7 Route map configuration	26
6.8 Configure UFD in reverse	27
6.9 BGP configuration	28
6.10 Static route configuration	30
7 Configure spine switches	31
7.1 Initial configuration settings	31
7.2 Downstream interface configuration	31
7.3 Route map configuration	33
7.4 BGP configuration	33
8 Leaf switch validation	37
8.1 General commands	37
8.1.1 show interface status	37
8.1.2 show vlan	37
8.1.3 show lldp neighbors	38
8.1.4 show uplink-state-group id_# detail	38
8.2 VLT validation commands	39
8.2.1 show vlt domain_id	39
8.2.2 show vlt domain_id backup-link	39
8.2.3 show vlt domain_id mismatch	39
8.2.4 show vlt domain_id vlt-port-detail	40
8.3 Routing validation commands	41
8.3.1 show bfd neighbors	41
8.3.2 show ip route	41
8.3.3 show ip bgp summary	42
8.4 EVPN validation commands	42
8.4.1 show ip route vrf vrf_name	42
8.4.2 show evpn evi	42
8.4.3 show ip bgp l2vpn evpn summary	43
8.4.4 show ip bgp l2vpn evpn	43
8.4.5 show evpn mac-ip	45
9 Spine switch validation	46
9.1 General commands	46
9.1.1 show interface status	46
9.1.2 show lldp neighbors	46
9.2 Routing validation commands	47
9.2.1 show bfd neighbors	47
9.2.2 show ip route	47
9.2.3 show ip bgp summary	48
9.2.4 show ip bgp l2vpn evpn summary	48
10 VMware host and network configuration	49
10.1 VMware ESXi download and installation	49
10.2 Install and configure VMware vCenter Server 6.7 U1	49
10.3 Add ESXi hosts to vCenter Server	49
10.4 Create VMs and install guest operating systems	50
10.5 vSphere distributed switches	51
10.6 Create a VDS	51
10.7 Add distributed port groups	52
10.8 Create LACP LAGs	52
10.9 Associate hosts and assign uplinks to LAGs	54
10.10 Connect VMs to VDS and port group	56
10.11 Configure networking in the guest OS	57
11 Validate connectivity	58
11.1 Validate tunneled Layer 2 bridging	58
11.2 Validate routing using anycast gateways	59
11.3 Validate routing using the indirect gateway	60
A Gateway/firewall switch configuration	62
A.1 Initial configuration settings	62
A.2 Indirect gateway configuration	62
A.3 Simulated external network interface configuration	63
A.4 Upstream interfaces	63
A.5 Static routes to VNIs	63
B Validated components	64
B.1 Dell EMC PowerSwitches	64
B.2 PowerEdge R740xd Servers	64
B.3 VMware software	64
C Technical resources	65
C.1 Dell EMC product manuals and technical guides	65
C.1 VMware product manuals and technical guides	65
D Fabric Design Center	66

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Dell EMC Networking Virtualization Overlay with BGP EVPN

4.1.1

BGP ASNs and router IDs

Figure 9 shows the autonomous system numbers (ASNs) and router IDs used for the leaf and spine switches

in this guide. Spine switches share a common ASN and each pair of leaf switches shares a common ASN.

ASNs should follow a logical pattern for ease of administration and allow for growth as switches are added.

Using private ASNs in the data center is a best practice. Private, 2-byte ASNs range from 64512 through

65534.

In this example, 65101 is used on both switches at the spine layer. Leaf switches use ASNs with a "2" in the

hundreds place, 65201 for example, and the last digit is used to uniquely identify the leaf pair. Additional

spine switches would be assigned the existing ASN for the spine layer, 65101. Additional leaf switches would

be added in pairs with the next pair assigned an ASN of 65204.

The IP addresses shown are loopback addresses used as BGP router IDs and for BGP EVPN peering.

Loopback addresses should follow a logical pattern to make it easier to manage and allow for growth. In this

example, the 10.2.0.0/16 IP address space is used. The third octet in the address represents the layer,

“1” for

spine and “2” for leaf, and th

e fourth octet is the counter for the appropriate layer

AS65202

AS65201

10.2.2.4

10.2.2.3

VLTi

10.2.2.2

10.2.2.1

VLTi

AS65203

10.2.2.6

10.2.2.5

VLTi

Spine 1

Spine 2

10.2.1.1

10.2.1.2

AS 65101

BGP ASNs and router IDs

4.1.2

Point-to-point IP networks

Establishing a logical, scalable IP address scheme is important before deploying a leaf-spine topology. The

point-to-point links used in this deployment are labeled A-O in Figure 10.

Rack 2

Rack 1

Leaf 2b

Leaf 2a

VLTi

Leaf 1b

Leaf 1a

Rack n

Leaf 3b

Leaf 3a

VLTi

Spine 1

Spine 2

Spine 1

Spine 2

Point-to-point networks