Release 1.0
Configuring VLAN Tagging
526360-001-00 Rev. B
MGBI
13-13
Bridging Packet Sizes
The VLAN Tagging feature will accept upstream Ethernet packets from CPEs up to a
maximum size of 1522 bytes from start of the Destination Address to the end of FCS.
A maximum size Ethernet packet with a single "inner" 802.1Q tag added by the
customer CPE is supported. When such packets are bridged onto the trunk mode
network port, the BSR adds an "outer" 802.1Q tag with the configured VLAN for the
CM, increasing the maximum packet size to 1526 bytes.
Likewise, in the downstream direction, the BSR accepts a maximum packet size of
1526 bytes, and will forward a maximum size packet of 1522 bytes to the bridging
CM.
Displaying VLAN Tagging Statistics
Use the
show bridge vlan
command
to display receive and transmit statistics for all
VLANs associated with a network bridge port or a specific VLAN, as follows:
MOT#
show bridge vlan
The following is typical screen output from the
show bridge vlan
command:
The
show bridge vlan counters
command displays statistical counters for all VLANs
or a specific VLAN associated with a network bridge port.
MOT#
show bridge vlan
[
counters
[
<
2-4094
>]]
where:
Note:
Some CMs may not forward 1522 byte packets with a customer
provided "inner" 802.1Q tag, and instead only forward a maximum size
packet of 1518 bytes. VLAN stacking of maximum size Ethernet packets is
not supported on such cable modems.
Vlan CM
---- --------------
2 0000.0000.0065
3 0000.0000.0066
Selected Network Bridge Port: ethernet 0/0
Содержание BSR 2000
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