7705 SAR Interfaces
376
Interface Configuration Guide
3HE 11011 AAAC TQZZA Edition: 01
Parameters plus — enables PoE+ on the 7705 SAR-H, 7705 SAR-Hc, 7705 SAR-W, 7705 SAR-Wx,
and 6-port SAR-M Ethernet module
ptp-asymmetry
Syntax ptp-asymmetry ptp-asymmetry
no ptp-asymmetry
Context config>port>ethernet
Description This command configures the PTP asymmetry delay delta on an Ethernet port. The command
corrects for known asymmetry for time of day/phase recovery of PTP packets on both local
and downstream PTP slave clocks as well as on end-to-end transparent clocks.
Parameters ptp-asymmetry — the value in nanoseconds that the forward path delay varies from the
mean path delay; the value can be a negative number
qinq-etype
Syntax qinq-etype 0x0600 to 0xffff
no qinq-etype
Context config>port>ethernet
config>port>dsl
Description This command specifies the Ethertype expected when the port’s encapsulation type is qinq.
The qinq-etype value sets the Ethertype for the outer VLAN tag when qinq encapsulation is
used.
IEEE 802.1ad (also known as VLAN stacking) defines a process to channelize a single
Ethernet port or v-port into double-tagged VLANs. Each VLAN can represent a customer or
an application. Each tag allows for up to 4096 VLANs to be configured on a port (4096 × 4096
total). For more information on VLANs and VLAN tagging, refer to “VLL Services” in the
7705 SAR Services Guide.
The Ethertype specifies the protocol being carried in an Ethernet frame. In 802.1q, the
Ethertype is set to the Tag Protocol Identifier (TPID) value of 0x8100, which identifies the
frame as an IEEE 802.1Q-tagged frame. As well, 2 bytes of Tag Control Information (TCI),
followed by 2 bytes containing the frame’s original Ethertype are added to the frame for each
tag (4 bytes total). Together, the TPID and TCI make up a VLAN tag.
The qinq-etype command is not supported by a v-port, or by DSL or GPON modules on the
7705 SAR-M. However, qinq-etype is supported by the DSL block on the 7705 SAR-Wx.
Network ports do not allow qinq-etype settings.
The no form of this command resets the qinq-etype value to the default.
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