Cisco Cisco ASR 5700
APN Configuration Mode Commands
▀ policy
▄ Command Line Interface Reference, StarOS Release 17
1422
policy
Configures the Mobile IPv6 policy to set the action to be taken when IPv4/IPv6 subscriber packets need to be tunneled
and the encapsulated packets exceed the tunnel maximum transmission unit (MTU).
and the encapsulated packets exceed the tunnel maximum transmission unit (MTU).
Product
P-GW
SAEGW
Privilege
Security Administrator, Administrator
Mode
Exec > Global Configuration > Context Configuration > APN Configuration
configure > context context_name > apn apn_name
Entering the above command sequence results in the following prompt:
[context_name]host_name(config-apn)#
Syntax
policy ipv6 tunnel mtu exceed { fragment [ inner ] | notify-sender }
[ default | no ] policy ipv6 tunnel mtu exceed
default
IPv6: System will do a Path MTU (PMTU) discovery and send “ICMPv6 Packet Too Big” to the original
sender if the subscriber packet exceeds MTU after encapsulation.
IPv4: System will do an outer IPv6 fragmentation if the packet exceeds MTU after encapsulation.
sender if the subscriber packet exceeds MTU after encapsulation.
IPv4: System will do an outer IPv6 fragmentation if the packet exceeds MTU after encapsulation.
no
Disables this functionality.
ipv6 tunnel mtu exceed { fragment [ inner ] | notify-sender }
fragment
: System will do an outer IPv6 fragmentation if the subscriber packet exceeds MTU after
encapsulation.
inner
:
IPv6: System will do a PMTU discovery and send “ICMPv6 Packet Too Big” to the original sender if the
subscriber packet exceeds MTU after encapsulation.
IPv4: If packet will exceed tunnel MTU after encapsulation, based on DF bit and ignore-df config, the
original IPv4 packet will be fragmented and then encapsulated so that it will not exceed MTU, or ICMP Error
will be sent if IPv4 packet fragmentation is not allowed.
subscriber packet exceeds MTU after encapsulation.
IPv4: If packet will exceed tunnel MTU after encapsulation, based on DF bit and ignore-df config, the
original IPv4 packet will be fragmented and then encapsulated so that it will not exceed MTU, or ICMP Error
will be sent if IPv4 packet fragmentation is not allowed.
notify-sender
:
IPv6: System will do a PMTU discovery and send “ICMPv6 Packet Too Big” to the original sender if
subscriber packet exceeds MTU after encapsulation.
IPv4: System will do an outer IPv6 fragmentation if packet exceeds MTU after encapsulation.
subscriber packet exceeds MTU after encapsulation.
IPv4: System will do an outer IPv6 fragmentation if packet exceeds MTU after encapsulation.