HPE 5900 series

298
Usage guidelines
The specified source address or the address of the specified source interface is used as the source
address of tunneled packets. To view the configured tunnel source address, use the display
interface tunnel command.
The source address of the local tunnel interface must be the destination address of the peer tunnel
interface, and vice versa.
If you execute this command multiple times, the most recent configuration takes effect.
Examples
# Specify VLAN-interface 10 as the source interface of interface Tunnel 1.
<Sysname> system-view
[Sysname] interface tunnel 1 mode gre
[Sysname-Tunnel1] source vlan-interface 10
# Specify 192.100.1.1 as the source address of interface Tunnel 1.
<Sysname> system-view
[Sysname] interface tunnel 1 mode gre
[Sysname-Tunnel1] source 192.100.1.1
Related commands
destination
display interface tunnel
interface tunnel
tunnel dfbit enable
Use tunnel dfbit enable to set the Don't Fragment (DF) bit for tunneled packets.
Use undo tunnel dfbit enable to restore the default.
Syntax
tunnel dfbit enable
undo tunnel dfbit enable
Default
The DF bit is not set for tunneled packets.
Views
Tunnel interface view
Predefined user roles
network-admin
Usage guidelines
To avoid fragmentation and delay, set the DF bit for tunneled packets. Make sure the path MTU is
larger than tunneled packets. Otherwise, do not set the DF bit to avoid discarding tunneled packets
larger than the path MTU.
This command is not supported on a GRE over IPv6 tunnel interface and an IPv6 tunnel interface.
Examples
# Set the DF bit for tunneled packets on interface Tunnel 1.
<Sysname> system-view
[Sysname] interface tunnel 1 mode gre