Cisco Cisco Tunnel Terminating Gateway (TTG) Guide De Dépannage
MIP NAT Traversal
Overview ▀
Cisco ASR 5000 Series Enhanced Feature Configuration Guide ▄
OL-22982-01
Figure 37. MIP UDP Tunneling negotiation between MN and HA
MN
MIP RRQ to HA
RRQ ('D')
MN-NAI Extn
UDP Tunnel Request Extn
Mobile-Home AE
MN-FAC Extn
MN-AAA Auth Extn
HA
MIP RRP to MN
RRP
MN-NAI Extn
UDP Tunnel Reply Extn
Mobile-Home AE
MN-FAC Extn
MN-AAA Auth Extn
MIP UDP Tunneling Data
The following table lists the various cases possible in UDP Tunneling negotiation during Mobile IP call establishment.
Table 30.
MIP UDP Tunneling Negotiation Cases
Case
RRQ received at the HA
Action at HA
1
NAT detected, UDP Tunnel Request sent, NAT Traversal
enabled
enabled
Accept call with IP-UDP tunneling, UDP Tunnel
Reply included in RRP
Reply included in RRP
2
NAT detected, UDP Tunnel Request sent, NAT Traversal
disabled at the HA
disabled at the HA
Reject with code 129
3
NAT not detected, UDP Tunnel Request sent, F bit not set
Accept call with IP-IP tunneling, UDP Tunnel Reply
not included
not included
4
NAT not detected, UDP Tunnel Request sent, F bit set, forced
UDP tunnel NOT allowed
UDP tunnel NOT allowed
Reject with code 129
5
NAT not detected, UDP Tunnel Request sent, F bit set, forced
UDP tunnel allowed
UDP tunnel allowed
Accept call with IP-UDP tunneling, UDP Tunnel
Reply included in RRP
Reply included in RRP
6
UDP Tunnel Request sent, D bit not set
Reject with code 134
7
NAT detected, UDP Tunnel Request not sent
Reject with code 129