Which of the following is TRUE concerning unnumbered VPN Tunnel Interfaces (VTIs)?
A.
They are only supported on the IPSO Operating System.
B.
VTIs cannot be assigned a proxy interface.
C.
VTIs can only be physical, not loopback.
D.
Local IP addresses are not configured, remote IP addresses are configured.
Explanation:
Supported on Gaia as well
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The IPSO operating system currently only supports unnumbered VTIs.
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A VPN Tunnel Interface (VTI) is a virtual interface on a VPN-1 component that is associated with an existing VPN tunnel, and is used by IP routing as a point-to-point interface directly connected to a VPN peer gateway. Each VTI is associated with a single tunnel to a VPN peer gateway. The tunnel behaves just like a point-to-point link between two gateways. The tunnel and its properties are defined by a VPN Community linking the two gateways. The peer gateways should also be configured with a VTI. The native IP routing mechanism on each gateway can then direct traffic into the tunnel, just as the mechanism would do for any other type of interface. Numbered VTIs have a unique IP address assigned to them, while unnumbered VTIs do not.
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