Cisco Cisco Packet Data Gateway (PDG)
Subscriber Configuration Mode Commands
data-tunneling ignore df-bit ▀
Command Line Interface Reference, StarOS Release 18 ▄
8821
data-tunneling ignore df-bit
Controls the handling of the DF (Don't Fragment) bit present in the user IPv4/IPv6 packet for GRE, IP-in-IP tunneling
used for the MIP data path. If this feature is enabled, and fragmentation is required for the tunneled user IPv4/IPv6
packet, then the DF bit is ignored and the packet is fragmented. Also the DF bit is not copied to the outer header.
Default is enabled.
used for the MIP data path. If this feature is enabled, and fragmentation is required for the tunneled user IPv4/IPv6
packet, then the DF bit is ignored and the packet is fragmented. Also the DF bit is not copied to the outer header.
Default is enabled.
Product
PDSN
HA
FA
ASN-GW
Privilege
Security Administrator, Administrator
Mode
Exec > Global Configuration > Context Configuration > Subscriber Configuration
configure > context context_name > subscriber { default | name subscriber_name }
Entering the above command sequence results in the following prompt:
[context_name]host_name(config-subscriber)#
Syntax
data-tunneling ignore df-bit
no data-tunneling ignore df-bit
no
Disables this option. The DF bit in the tunneled IP packet header is not ignored during tunneling.
data-tunneling ignore df-bit
Ignores the DF bit in the tunneled IP packet header.
Usage
Use this command to configure a user so that during Mobile IP tunneling the DF bit is not ignored and
packets are not fragmented.
packets are not fragmented.
Example
To disable fragmentation of a subscribers packets over a MIP tunnel even when the DF bit is present, enter
the following command:
the following command:
no data-tunneling ignore df-bit