3COM_OS_SW8800_V3.01.32s256rec13_Release_Notes

3COM OS SW8800 V3.01.32s256rec13 Release Notes
April 25, 2013 Page 9 of 70
Limitation 12
【QOS】Do not enable the flow control function on either the 3C17528/3C17532/ 3C17528A board,
because none of them support the flow control function.
Limitation 13
【QOS】After the priority has been set on the port, upon queue traffic shaping, packet loss may
occur during line-speed packet forwarding.
Limitation 14
【MSTP】By default, a stp-disabled port broadcasts BPDU packets to all the ports in the VLAN. You
need to use the stp non-flooding command in system view to disable the port from broadcasting
BPDU packets.
Limitation 15
【MSTP】Do not turn up/down the core link in the case that there are a large number of instances in
the MSTP networking. Otherwise, concurrent switchover may cause traffic down for a long period.
Limitation 16
【MPLS】Do not configure provider router between PE and ASBR PE in VPLS trans-domain multi-
hop network employment. Otherwise, L2VPN forwarding service may not function.
Limitation 17
【MPLS】Upon trans-domain single-hop networking, the SW8800 system supports as many as 12K
of private network labels. If the device learns more private network labels, the MPLS label resources
will be used up and VPN service forwarding will fail.
Limitation 18
【MPLS】The MPLS packet cannot be matched by the source MAC. For example, define rule 0
permit mpls ingress H-H-H 0000-0000-0000 egress any, and then configure the redirection rule on the
public network port. In this case, the redirection rule does not work.
Limitation 19
【MPLS】LDP does not distribute the Forwarding Equivalence Classes (FEC) with a 32-bit subnet
masks of their vlan-interfaces. If you want to use the LSPs of this type of FEC, you must configure the
corresponding static LSP manually.
Limitation 20
【MPLS】 In an L2VPN network with kompella mode, all the PEs are recommended to be fully
connected. It is recommended not to use BGP reflectors; otherwise, some L2VPN connections will fail
to be established in case that many L2VPN connections need to be established.