I have a link which is LT2P from a site router R1 (Cisco 867-VAE, IOS 15.3) which has two external interfaces defined (dialer1 and vlan-1000), but only one plugged in (first is ADSL, second is technician's 4g router)

   Exterior view               Tunnel view

   R99                         R99
    |                           |vpp1
   cloud                        |
    ||                          |
  d1||vlan1000                  |vpp1
    R1                          R1

All of this works fine with either ip local interface Dialer1 or ip local interface vlan1000 in the configuration of the pseudowire-class.

My question is how do I make my virtual-PPP interface work according to whether either interface is plugged in and working without having to reconfigure psuedowire-class? It seems I can't add a second pseudowire inside int virtual-ppp1, nor a second ip local inside pseudowire-class. Do I have to have a whole extra virtual-ppp2 and pseudowire-class?

Interface config of R1 has two dynamic-address external interfaces:

interface Vlan1000
 ip address dhcp
 ip nat outside
interface Dialer1
 ip address negotiated
 ip nat outside

ip route Dialer1
ip route dhcp

This is the tunnelling configuration:

pseudowire-class PWCLASS
 encapsulation l2tpv2
 ip local interface Dialer1

interface Virtual-PPP1
 ip address negotiated
 pseudowire R99-exernal-address 1 encapsulation l2tpv2 pw-class PWCLASS
System image file is "flash:c860vae-advsecurityk9_npe-mz.153-3.M.bin"
  • Have you tried creating an additional Virtual PPP interface and then add another pseudowire-class as you describe yourself? – user56700 May 25 at 14:28

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