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Deployment Guide

ManualsBrandsDell ManualsAccess PlatformsOS9
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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 anylocal
tunnel allow-remote 40.1.1.2
tunnel mode ipip decapsulate-any
no shutdown
Guidelines for Configuring Multipoint Receive-Only
Tunnels
● You can configure up to eight remote end-points for a multipoint receive-only tunnel. The maximum number of remote end-
points supported for all multipoint receive-only tunnels on the switch depends on the hardware table size to setup
termination.
● The IP MTU configured on the physical interface determines how multiple nested encapsulated packets are handled in a
multipoint receive-only tunnel.
● Control-plane packets received on a multipoint receive-only tunnel are destined to the local IP address and routed to the
CPU after decapsulation. A response to these packets from the switch is only possible if the route to the sender does not
pass through a receive-only tunnel.
● Multipathing over more than one VLAN interface is not supported on packets routed through the tunnel interface.
● IP tunnel interfaces are supported over ECMP paths to the next hop. ECMP paths over IP tunnel interfaces are supported.
ARP and neighbor resolution for the IP tunnel next-hop are supported.
Multipoint Receive-Only Tunnels
A multipoint receive-only IP tunnel decapsulates packets from remote end-points and never forwards packets on the tunnel. You
can configure an additional level of security on a receive-only IP tunnel by specifying a valid prefix or range of remote peers.
The operational status of a multipoint receive-only tunnel interface always remains up. Packets from the remote addresses
configured for a multipoint receive-only tunnel are decapsulated and are not marked for neighbor resolution as for a standard
tunnel’s destination address. Connected routes for the tunnel interface’s IP subnet do not point towards the tunnel but towards
the switch CPU for the receive-only tunnel. The tunnel interface can function as an unnumbered interface with no IPv4/IPv6
address assigned.
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Tunneling