Concept Guide

Conguring a Tunnel Interface
You can congure the tunnel interface using the ip unnumbered and ipv6 unnumbered commands.
To congure the tunnel interface to operate without a unique explicit IP or IPv6 address, select the interface from which the tunnel borrows
its address.
The following sample conguration shows how to use the interface tunnel conguration commands.
DellEMC(conf-if-te-1/1/1)#show config
!
interface TenGigabitEthernet 1/1/1
ip address 20.1.1.1/24
ipv6 address 20:1::1/64
no shutdown
DellEMC(conf)#interface tunnel 1
DellEMC(conf-if-tu-1)#ip unnumbered tengigabitethernet 1/1/1
DellEMC(conf-if-tu-1)#ipv6 unnumbered tengigabitethernet 1/1/1
DellEMC(conf-if-tu-1)#tunnel source 40.1.1.1
DellEMC(conf-if-tu-1)#tunnel mode ipip decapsulate-any
DellEMC(conf-if-tu-1)#no shutdown
DellEMC(conf-if-tu-1)#show config
!
interface Tunnel 1
ip unnumbered TenGigabitEthernet 1/1/1
ipv6 unnumbered TenGigabitEthernet 1/1/1
tunnel source 40.1.1.1
tunnel mode ipip decapsulate-any
no shutdown
DellEMC(conf-if-tu-1)#
Conguring Tunnel Allow-Remote Decapsulation
You can congure an IPv4 or IPV6 address or prex whose tunneled packet is accepted for decapsulation.
• If you do not congure allow-remote entries, tunneled packets from any remote peer address are accepted.
• You can congure up to eight allow-remote entries on any particular multipoint receive-only tunnel.
The following sample conguration shows how to congure a tunnel allow-remote address.
DellEMC(conf)#interface tunnel 1
DellEMC(conf-if-tu-1)#ipv6 address 1abd::1/64
DellEMC(conf-if-tu-1)#ip address 1.1.1.1/24
DellEMC(conf-if-tu-1)#tunnel source 40.1.1.1
DellEMC(conf-if-tu-1)#tunnel mode ipip decapsulate-any
DellEMC(conf-if-tu-1)#
tunnel allow-remote 40.1.1.2
DellEMC(conf-if-tu-1)#no shutdown
DellEMC(conf-if-tu-1)#show config
!
interface Tunnel 1
ip address 1.1.1.1/24
ipv6 address 1abd::1/64
tunnel source 40.1.1.1
tunnel allow-remote 40.1.1.2
tunnel mode ipip decapsulate-any
no shutdown
Tunneling
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