Router User Manual

Nortel Secure Router 8000 Series
Troubleshooting - VAS 4 NAT troubleshooting
Issue 01.01 (30 March 2009) Nortel Networks Inc. 4-7
Figure 4-5 troubleshooting flowchart
Is fault rectified?
Configure routes
from the internal
network to external
network
Associate the address
pool with ACLs
Are ACL rules
correctly
configured?
Is the address
pool associated
with ACLs?
Are physical
status of interfaces
Up?
Configuring NAT
fails
Make the
interfaces go
Up
Is fault rectified?
Is fault rectified?
Is fault rectified?
No
No
No
No
No
No
Yes
Yes
Yes
Yes
No
Yes
Are there
routes from the
internal network to
external
network?
Are
outbound interface
address and address
pool on same network
segment?
End
Seek technical
support
Reconfigure ACL rules
Configure routes from
hosts to the address
pool
Are there
routes from the
external network to
address pool?
Configure routes
from the external
network to address
pool
Is fault rectified?
Is fault rectified?
No
No
No
No
Yes
Yes
Are there
routes from hosts to
the address pool?
Is fault rectified?
Is fault rectified?
No
No