HP ProCurve Management And Configuration Guide

Monitoring and Analyzing Switch Operation
Traffic Mirroring
Table B-2. Maximum Frame Sizes for Mirroring
Frame Type
Configuration
Maximum
Frame
Size
VLAN
Tag
Frame Mirrored
to Local Port
Frame Mirrored to
Remote Port
Data Data IPv4 Header
Untagged
Non-Jumbo
(default config.)
Jumbo
1
on All VLANs
Jumbo
1
On All But
Source VLAN
1518
9216
1518
0
0
0
1518
9216
n/a
2
1464 54
9162 54
1464 54
Tagged
Non-Jumbo
Jumbo
1
on All VLANs
Jumbo
1
On All But
Source VLAN
1522
9220
1522
4
4
4
1522
9218
n/a
2
1468 54
9164 54
1468 54
1
Jumbo frames are allowed on ports operating at or above 1 Gbps.
2
For local mirroring, a non-Jumbo configuration on the source VLAN dictates an MTU of 1518
bytes for untagged frames, and an MTU of 1522 for tagged frames, regardless of the Jumbo
configuration on any other VLANs on the switch.
Effect of Downstream VLAN Tagging on
Untagged, Mirrored Traffic
In a remote mirroring application, if mirrored traffic leaves the switch without
802.1Q VLAN tagging, but is forwarded through a downstream device that adds
802.1Q VLAN tags, then the MTU for untagged, mirrored frames leaving the
source switch is reduced below the values shown in table B-2. That is, if the
MTU on the path to the destination is 1522 bytes, then untagged, mirrored
frames leaving the source switch cannot exceed 1518 bytes. If the MTU on the
path to the destination is 9220 bytes, then untagged, mirrored frames leaving
the source switch cannot exceed 9216 bytes.
B-69

HP ProCurve Specifications

General

Brand	HP
Model	ProCurve
Category	Switch
Language	English