Layer 2.5 VPNs on T-series and M320 routers support IPv4, IS-IS, and MPLS traffic types. Layer 2.5 VPNs running on M-series routers support only IPv4 traffic. Layer 2.5 VPNs do not support IPv6.
By default, IPv4 traffic runs on T-series and M320 routers. To configure IS-IS (ISO traffic) or MPLS traffic on Layer 2.5 VPNs, you must configure both ends of the VPN with the protocol configuration.
The same type of Layer 3 traffic must be configured on both ends of a TCC connection. By default, TCC connections carry IPv4 traffic. To specify which traffic can run over a TCC interface, include the [inet | mpls | iso] statement at the [edit interfaces interface-name encapsulation encapsulation-type logical-unit-number family tcc protocol] hierarchy level:
- [edit]
- interfaces {
-
-
interface
so-2/0/0 {
-
- encapsulation ppp-tcc;
unit 0
{
-
- family tcc {
- protocols [iso | inet | mpls];
- }
- }
- }
- }
When enabling ISO over a Layer 2.5 VPN that is configured on a CE Ethernet interface, include the [point-to-point] statement at the [edit protocols isis interface interface-name] hierarchy level:
- [edit]
- protocols {
-
- isis {
-
- interface fe-1/0/0.0 {
- point-to-point;
- }
- }
- }
For a full explanation of Layer 2 VPNs and configuration samples, see the JUNOS VPNs Configuration Guide.