Users Guide

● View the currently configured overlay routing profile; for example, in the S5200-ON series:
show hardware overlay-routing-profile mode
Overlay Underlay Overlay Underlay
Setting Mode Next-hop Next-hop L3 RIF L3 RIF
Entries Entries Entries Entries
Current default-overlay-routing 8192 57344 2048 14336
Next-boot default-overlay-routing 8192 57344 2048 14336
DHCP relay on VTEPs
Dynamic Host Configuration Protocol (DHCP) clients in overlay communicate with a DHCP server using the DHCP relay on the
VTEP switch. DHCP server and the client can reside in the same VRF or in different VRFs. If they are in different VRFs,
configure the route-leaking to allow communication between the client subnet in the client-VRF and the server in the server-
VRF. If they are in the same VRF, route leaking need not be configured.
DHCPv4 relay on VTEPs supports the following option 82 sub-options:
● Server ID override suboption - Sub-option 11(0xb)
● Link selection suboption- Sub-option 5(0x5)
● DHCPv4 virtual subnet selection option - Sub-option 151(0x97)
● DHCPv4 virtual subnet selection control - Sub-option 152(0x98)
● source-interface CLI for relay agents. The gateway address (giaddr) field carries the source interface address.
Use the Link selection suboption, Server ID override suboption, and source-interface to minimize the route leaking
configurations. Only the DHCP server subnet needs to be leaked into client-VRF and the DHCP client-subnets in client-VRF
need not be leaked into server-VRF. The source-interface must be reachable from the server-VRF, and the DHCP server sends
responses to the source-interface IP.
Use the VSS suboption to send the configured client VRF information to the DHCP server to allocate an IP address based on
the VRF.
Configure DHCP relay on VTEPs
To configure DHCP relay on the virtual-network interface of the tenant VRF, run the following commands:
OS10(config)# interface virtual-network 10
OS10(conf-if-vn-10)# ip helper-address 40.1.1.1 vrf tenant01
View VXLAN configuration
Use show commands to verify the VXLAN configuration and monitor VXLAN operation.
View the VXLAN virtual network
OS10# show virtual-network
Codes: DP - MAC-learn Dataplane, CP - MAC-learn Controlplane, UUD - Unknown-Unicast-Drop
Un-tagged VLAN: 888
Virtual Network: 60000
VLTi-VLAN: 2500
Members:
VLAN 1000: port-channel1, ethernet1/1/9, ethernet1/1/10
VLAN 2500: port-channel1000
VxLAN Virtual Network Identifier: 16775000
Source Interface: loopback100(222.222.222.222)
Remote-VTEPs (flood-list): 55.55.55.55(DP),77.1.1.1(DP)
View the VXLAN virtual-network port
OS10# show virtual-network interface ethernet 1/1/1
Interface Vlan Virtual-network
ethernet1/1/1 100 1000
ethernet1/1/1 200 2000
ethernet1/1/1 300 3000
VXLAN
1145