On Wed, Apr 15, 2015 at 10:45:59AM +0800, Vinllen Chen wrote:
> I have three question about the lldp packets:
> 1. Does the ovs will forward lldp once receive it
> 2. Does the ovs will send lldp packet to other host or controller or ovs
> 3. Does the ovs will receive lldp reply after sending it
It depends on how you configure OVS. ovs-vswitchd.conf.db(5) says:
other_config : forward-bpdu: optional string, either true or false
Controls forwarding of BPDUs and other network control frames
when NORMAL action is invoked. When this option is false or
unset, frames with reserved Ethernet addresses (see table below)
will not be forwarded. When this option is true, such frames
will not be treated specially.
The above general rule has the following exceptions:
· If STP is enabled on the bridge (see the stp_enable col‐
umn in the Bridge table), the bridge processes all
received STP packets and never passes them to OpenFlow or
forwards them. This is true even if STP is disabled on
an individual port.
· If LLDP is enabled on an interface (see the lldp column
in the Interface table), the interface processes received
LLDP packets and never passes them to OpenFlow or for‐
wards them.
Set this option to true if the Open vSwitch bridge connects dif‐
ferent Ethernet networks and is not configured to participate in
STP.
This option affects packets with the following destination MAC
addresses:
01:80:c2:00:00:00
IEEE 802.1D Spanning Tree Protocol (STP).
01:80:c2:00:00:01
IEEE Pause frame.
01:80:c2:00:00:0x
Other reserved protocols.
00:e0:2b:00:00:00
Extreme Discovery Protocol (EDP).
00:e0:2b:00:00:04 and 00:e0:2b:00:00:06
Ethernet Automatic Protection Switching (EAPS).
01:00:0c:cc:cc:cc
Cisco Discovery Protocol (CDP), VLAN Trunking Protocol
(VTP), Dynamic Trunking Protocol (DTP), Port Aggregation
Protocol (PAgP), and others.
01:00:0c:cc:cc:cd
Cisco Shared Spanning Tree Protocol PVSTP+.
01:00:0c:cd:cd:cd
Cisco STP Uplink Fast.
01:00:0c:00:00:00
Cisco Inter Switch Link.
01:00:0c:cc:cc:cx
Cisco CFM.
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