3com 3031 Instruccion De Instalación
910
C
HAPTER
64: C
ONFIGURATION
OF
GRE
Same source address and destination address cannot be configured on two or
more Tunnel interfaces that encapsulated with the same kind of protocol.
more Tunnel interfaces that encapsulated with the same kind of protocol.
The command
source
configures actual physical interface address or actual
physical interface. In order to support dynamic routing protocol, the network
address of Tunnel interface also needs configuring by using the
address of Tunnel interface also needs configuring by using the
ip address
command in Tunnel interface view.
Specifying the
Destination End of the
Tunnel
After the creation of Tunnel interface, the destination address of the Tunnel, i.e. IP
address of the actual physical interface receiving GRE packet, also needs to be
specified. The source end address and destination end address of the Tunnel
uniquely identify one tunnel. These configurations are required to be configured
on both ends of the Tunnel and the addresses of the two ends are comparatively
source end and destination end.
address of the actual physical interface receiving GRE packet, also needs to be
specified. The source end address and destination end address of the Tunnel
uniquely identify one tunnel. These configurations are required to be configured
on both ends of the Tunnel and the addresses of the two ends are comparatively
source end and destination end.
Perform the following configuration in tunnel interface view.
The
destination
command sets IP address of actual physical interface. In order to
support dynamic routing protocol, network address of tunnel interface also needs
configuring.
configuring.
Assigning Network
Address for Tunnel
Interface
The network address of Tunnel interface also needs configuring to make the
Tunnel support dynamic routing protocol. The network address of Tunnel interface
is unnecessarily to be applied network address. The network addresses configured
by the user on both ends of the tunnel should keep on the same network
segment. These configurations are required to be configured on both ends of the
Tunnel to ensure the address is in the same network segment.
Tunnel support dynamic routing protocol. The network address of Tunnel interface
is unnecessarily to be applied network address. The network addresses configured
by the user on both ends of the tunnel should keep on the same network
segment. These configurations are required to be configured on both ends of the
Tunnel to ensure the address is in the same network segment.
Perform the following configuration in Tunnel interface view.
By default, network address of Tunnel interface is not configured.
Configuring the
End-to-end Verification
on Both Ends of Tunnel
on Both Ends of Tunnel
It is stipulated in RFC1701 that, if Checksum of GRE header is set, the checksum is
valid. The forwarder will calculate the checksum according to GRE header and
payload information and forward the packet containing checksum to the peer
end. The receiver calculates checksum of received packet and compares it with the
checksum in packet. If they are consistent, the packet will be further processed,
otherwise it will be discarded.
valid. The forwarder will calculate the checksum according to GRE header and
payload information and forward the packet containing checksum to the peer
end. The receiver calculates checksum of received packet and compares it with the
checksum in packet. If they are consistent, the packet will be further processed,
otherwise it will be discarded.
Table 976 Specifying the destination address of tunnel interface
Operation
Command
Set the destination address of tunnel
interface.
interface.
destination X.X.X.X
Delete the destination address of
tunnel interface.
tunnel interface.
undo destination
Table 977 Assigning network address for Tunnel interface
Operation
Command
Set IP address for Tunnel interface
ip address X.X.X.X mask
Delete IP address of Tunnel interface
undo ip address