Configuration tasks for gre tunnels – Brocade Communications Systems Layer 3 Routing Configuration ICX 6650 User Manual
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Brocade ICX 6650 Layer 3 Routing Configuration Guide
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IPv4 point-to-point GRE tunnels
Configuration tasks for GRE tunnels
Brocade recommends that you perform the configuration tasks in the order listed in Table 13.
The following features are also supported on GRE tunnel interfaces:
•
Naming the tunnel interface (CLI command port-name) – for configuration details, refer to the
section “Assigning a port name” in the Brocade ICX 6650 Administration Guide.
•
Changing the Maximum Transmission Unit (MTU) (CLI command ip mtu) – for configuration
details, refer to
“Changing the MTU on an individual port”
•
Increasing the cost of routes learned on the port (CLI command ip metric) – for configuration
details, refer to
“Changing the cost of routes learned on a port”
After performing the configuration steps listed in Table 13, you can view the GRE configuration and
observe the routes that use GRE tunnels. For details, refer to
TABLE 13
Configuration tasks for GRE tunnels
Configuration tasks
Default behavior
For more information
Required tasks
1
Create a tunnel interface
Not assigned
2
Configure the source address or source
interface for the tunnel interface
Not assigned
“Configuring the source address or
source interface for a tunnel
interface”
3
Configure the destination address of the
tunnel interface
Not assigned
“Configuring the destination address
for a tunnel interface”
4
Enable GRE encapsulation on the tunnel
interface
Disabled
“Enabling GRE encapsulation on a
tunnel interface”
5
Configure an IP address for the tunnel
interface
Not assigned
“Configuring an IP address for a
tunnel interface”
6
If a route to the tunnel destination
(configured in Step 3) does not already
exist, create a static route to the tunnel
destination.
Not assigned
“Configuring a static route to a tunnel
destination”
Optional tasks
1
Change the maximum transmission unit
(MTU) value for the tunnel interface
1476 bytes or
10194 bytes (jumbo
mode)
“Changing the MTU value for a tunnel
interface”
2
Change the number of GRE tunnels
supported on the device
Support for 32 GRE
tunnels
“Changing the maximum number of
tunnels supported”
3
Enable and configure GRE link keepalive
on the tunnel interface
Disabled
“Configuring GRE link keepalive”
4
Change the Path MTU Discovery (PMTUD)
configuration on the GRE tunnel interface
Enabled
“Configuring Path MTU Discovery”
5
Enable support for IPv4 multicast routing
Disabled