H3C Technologies H3C S12500-X Series Switches - Manual (Page 15)

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Step Command Remarks
3. Specify a source IP address
or interface for the tunnel. source { ipv4-address |
interface-type interface-number }
By default, no source IP address or
source interface is specified for any
tunnel.
The source interface can be a Layer 3
Ethernet interface, Layer 3 aggregate
interface, VLAN interface, or Layer 3
loopback interface.
EVI uses the specified address or the
primary IP address of the specified
source interface as the source IP
address of tunneled packets on the
transport network.
EVI networks can share a tunnel
source IP address or interface.
4. Configure the EVI link
keepalive interval and the
maximum number of
keepalive transmissions.
keepalive [ seconds [ times ] ]
By default, a keepalive packet is sent
every five seconds and the maximum
number of transmissions is two.
If no reply is received from the remote
end on an EVI link after the maximum
number of keepalive transmissions is
reached, the local end considers the
EVI link as having failed.
5. (Optional.) Generate a GRE
key for tunneled packets
based on their VLAN IDs. gre key vlan-id
By default, EVI tunneled packets do
not contain a GRE key.
The GRE key setting must be the same
across an EVI network. Perform this
step if any remote edge devices
generate VLAN ID-based GRE keys
for EVI tunneled packets.
Assigning a network ID to the EVI tunnel
Assign the same network ID to the EVI tunnels of all edge devices in an EVI network.
On an edge device, the network ID assigned to an EVI tunnel must be unique.
To assign a network ID to an EVI tunnel:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter tunnel interface view.
interface tunnel number
[ mode evi ]
N/A
3. Specify a network ID. evi network-id number By default, no network ID is specified.
Specifying extended VLANs on the EVI tunnel
When configuring extended VLANs, follow these guidelines: