Routers Administrator's Handbook

Administrator’s Handbook

Displayed port inter faces vary depending on the kinds of physical ports on your Gateway, for exam-

ple, Ethernet.

For Motorola Netopia

VGx technology models, separate Ethernet switch ports are displayed and

may be conﬁgured.

To enable any of them on this VLAN, check the associated Enable checkbox(es).

Typically you will choose a physical port, such as an Ethernet port (example: eth0.1).

❑ When you enable an interface, the Tag, Priority, and Promote checkboxes, and the 802.1p Priority

Bit menu appear for that interface.

Tag – Packets transmitted from this port through this VLAN must be tagged with the VLAN VID. Pack-

ets received through this port destined for this VLAN must be tagged with the VLAN VID by the

source. The Tag option is only available on global type ports.

Priority – Use any 802.1p priority bits in the VLAN header to prioritize packets within the Gateway’s

internal queues, according to DiffServ priority mapping rules.

Promote – When checked, this port writes any speciﬁed 802.1p priority bits (page 81) into the IP-

TOS header bit ﬁeld for IP packets received on this port, destined for this particular VLAN. It writes

any speciﬁed IP-TOS priority bits into the 802.1p priority bit ﬁeld for tagged IP packets transmitted

from this port for this VLAN.

All mappings between Ethernet 802.1p and IP-TOS are made according to a pre-deﬁned QoS map-

ping policy. The pre-deﬁned mapping can now be set in the CLI. See “Queue Conﬁguration” on

page 177.

802.1p Priority Bit – If you select a value greater than 0, all packets received on this port with

unmarked priority bits will be re-marked to this priority. If the port 802.1p PBit is greater than 0, the

VLAN 802.1p PBit setting is ignored.

❑ Select an IP Interface for this VLAN if it is to be routed; otherwise leave the default. These selec-

tions will vary depending on your IP interfaces. For example, if you have set up multiple VCCs, these

will appear in the list as ip-vcc1, ip-vcc2, and so forth.

❑ When you select an IP interface, the screen expands to allow you to conﬁgure Inter-Vlan-Groups.

Inter-VLAN groups allow VLANs in the group to route trafﬁc to the others; ungrouped VLANs cannot

route trafﬁc to each other.