HP ProCurve 6400cl Series Management And Configuration Manual page 294

Port Traffic Controls
Jumbo Packets on the Series 3400cl and Series 6400cl Switches
13-22
Jumbo-Enabled VLAN
VLAN 10
Port 3 belongs to both VLAN 10 and VLAN 20.
Jumbo packets received inbound on port 3 can be
forwarded out the Non-Jumbo ports 4, 5, and 6.
Figure 13-7. Forwarding Jumbo Packets Through Non-Jumbo Ports
Jumbo packets can also be forwarded out non-jumbo ports when the
jumbo packets received inbound on a jumbo-enabled VLAN are routed to
another, non-jumbo VLAN for outbound transmission on ports that have
no memberships in other, jumbo-capable VLANs. Where either of the
above scenarios is a possibility, the downstream device must be config­
ured to accept the jumbo traffic. Otherwise, this traffic will be dropped
by the downstream device.
Jumbo Traffic in a Switch Mesh Domain. Note that if a switch belongs
■
to a meshed domain, but does not have any VLANs configured to support
jumbo traffic, then the meshed ports on that switch will drop any jumbo
packets they receive from other devices. In this regard, if a mesh domain
includes any HP ProCurve Series 5300xl switches and/or HP ProCurve
1600M/2400M/2424M/4000M/8000M switches along with Series 3400cl and
Series 6400cl switches configured to support jumbo traffic, only the
3400cl/6400cl switches will receive jumbo packets. The other switch
models in the mesh will drop such packets. For more information on
switch meshing, refer to the chapter titled "Switch Meshing" in the
Advanced Traffic Management Guide for your switch.
1 2 3 4 5 6
Non-Jumbo VLAN
VLAN 20