Disables penultimate hop popping (PHP) on the specified VLAN (Virtual LAN). When enabled, PHP is requested on all LSPs advertised over that VLAN for which the switch is the egress LSR.
| vlan | Disables PHP for one or more specific VLANs. |
| vlan_name | Disables PHP on the specified VLAN. |
| vlan all | Disables PHP for all VLANs that have been added to MPLS (Multiprotocol Label Switching). |
Disabled
When PHP is disabled on a VLAN, penultimate hop popping is not requested on any LSPs advertised over that VLAN for which the switch is the egress LSR. Therefore, the Implicit Null Label is not used for any advertised mapping. Extreme's MPLS implementation always performs penultimate hop popping when requested to do so by a peer LSR. When the all VLANs option is selected, PHP is disabled on all existing MPLS interfaces.
Note
PHP is sometimes used to reduce the number of MPLS labels in use. If PHP is enabled on any MPLS interface, a unique MPLS label is consumed for every label advertised over that interface. Therefore, if PHP is being disabled to reduce label consumption, it should be done on all interfaces for minimal label consumption.In ExtremeXOS, this command can be executed while MPLS is enabled.
The following command disables penultimate hop popping (PHP) on the specified VLAN:
disable mpls php vlan vlan1
This command was first available in ExtremeXOS 11.6.
This command is available only on the platforms that support MPLS as described in the ExtremeXOS 22.4 Feature License Requirements document.
Print
this page
Email this topic
Feedback
View PDF
Download EPUB