Port cross-connect (PXC)
For information about PXC, see the 7450 ESS, 7750 SR, 7950 XRS, and VSR Interface Configuration Guide, "Port Cross-connect".
In-band management using a VPRN service and PXC shows an example of the operation of in-band management using a VPRN and PXC.
![](graphics/ti026591.png)
The following CLI example shows the configuration of the PXC based on the example shown in In-band management using a VPRN service and PXC.
- Example:
-
A:DUT>config>port 1/2/6 shutdown
A:DUT>config>port-xc
A:DUT>config>port-xc# pxc 1 create
A:DUT>config>port-xc>pxc# port 1/2/6
A:DUT>config>port-xc>pxc# no shutdown
A:DUT>config>port-xc>pxc# exit all
A:DUT>>configure
A:DUT>>config# port pxc-1.a no shutdown
A:DUT>>config# port pxc-1.b no shutdown
A:DUT>>config# port 1/2/6 no shutdown
To ensure management traffic from the CPM can reach the NSP NFM-P over the VPRN, an interface in the Global Routing Table (GRT) is configured on one of the PXC ports. In the example shown in In-band management using a VPRN service and PXC, the GRT PXC port is port pxc-1.b. This port is looped internally together with PXC port pxc-1.a, the SAP of the in-band management VPRN. A router interface is required on port pxc-1.b:1 (VLAN 1) and used to route management traffic from the CPM toward the in-band management VPRN. A static route is configured in the GRT for the NSP NFM-P address, 1.1.1.1, with a next hop of the VPRN SAP, or port pxc-1.a:1. The following CLI output shows configuration examples in the GRT.
*A:DUT>config>service>vprn# info
----------------------------------------------
interface "pxc"
address 192.168.255.0/31
port pxc-1.b:1
no shutdown
exit
...
static-route-entry 1.1.1.1/24
next-hop 192.168.255.1
no shutdown
exit
exit
...
----------------------------------------------
*A:DUT>config>router#
A SAP interface on the other PXC port is required by the in-band management VPRN to route management traffic toward the CPM. A static route is configured in the VPRN for the CPM system IP address 10.10.10.1, with a next hop of the GRT interface port pxc-1.b:1. The following CLI output shows configuration examples for the VPRN.
*A:ALU-1>config>service# info
----------------------------------------------
...
vprn 1 customer 1 create
autonomous-system 65200
route-distinguisher 65200:1
auto-bind-tunnel
resolution-filter
gre
exit
exit
vrf-target target:65200:1
interface "pxc" create
address 192.168.255.1/31
sap pxc-1.a:1 create
exit
exit
static-route-entry 10.10.10.1/32 next-hop 192.168.255.0
no shutdown
exit
...