cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
2384
Views
0
Helpful
2
Replies

Using NAT with Interface Virtual-Template

ovieira
Level 1
Level 1

Hi!

I'm trying to use NAT to a Virtual-Template interface (see the example). It doesn't work (the virtual-template is also down-down). Where seems to be the problem?

##################

hostname Router

!

ip cef

!

multilink virtual-template 1

!

controller E1 0/0

channel-group 1 timeslots 1-31

!

controller E1 0/1

channel-group 1 timeslots 1-31

!

controller E1 1/0

channel-group 1 timeslots 1-31

!

controller E1 1/1

channel-group 1 timeslots 1-31

!

interface Serial0/0:1

ip unnumbered Virtual-Template1

ip nat outside

encapsulation ppp

no keepalive

no fair-queue

ppp multilink

!

interface Serial0/1:1

ip unnumbered Virtual-Template1

ip nat outside

encapsulation ppp

no keepalive

no fair-queue

ppp multilink

!

interface FastEthernet1/0

ip address 10.10.0.9 255.255.0.0

ip nat inside

!

interface Serial1/0:1

ip unnumbered Virtual-Template1

ip nat outside

encapsulation ppp

no keepalive

no fair-queue

ppp multilink

!

interface Serial1/1:1

ip unnumbered Virtual-Template1

ip nat outside

encapsulation ppp

no keepalive

no fair-queue

ppp multilink

!

interface Virtual-Template1

ip address 62.48.193.242 255.255.255.252

ip accounting output-packets

ip nat outside

ppp multilink

no ppp multilink fragmentation

!

ip nat inside source list 69 interface Virtual-Template1 overload

ip classless

ip route 0.0.0.0 0.0.0.0 62.48.193.241

!

access-list 69 permit 10.10.0.0 0.0.255.255

######################################

2 Replies 2

raymong
Level 4
Level 4

NAT will not work if the interface you are overloading to is not in an up/up status. Under your serial interfaces, you have keepalives turned off... be sure that those serial lines are actually up and that traffic can traverse those links.

Hi!

I solved the problem using a loopback and configuring "ip unnumbered" in the Virtual-template interface. About your question: traffic does go trough the serial interfaces but the NAT traffic. The problem was that the Virtual-template interface is always down/down and, as you say, we can't do NAT with that kind of interface.

Thanks for your answer,

Olindo

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: