diff options
| author | Ben Pfaff <blp@nicira.com> | 2011-07-18 14:30:42 -0700 |
|---|---|---|
| committer | Ben Pfaff <blp@nicira.com> | 2011-07-18 14:30:42 -0700 |
| commit | 07817dfe1179dc08b67f37875f2b8a818556fc3d (patch) | |
| tree | ea6c8e16f5ebf810f5640f32198b66f068a76e9b /vswitchd | |
| parent | 57c1c735da75c7f34672bb20a7076f1ed4ccb830 (diff) | |
| download | openvswitch-07817dfe1179dc08b67f37875f2b8a818556fc3d.tar.gz | |
ofproto-dpif: Do not mirror L2 multicast switch protocols to VLANs.
Mirroring certain protocols interpreted by switches to a VLAN can deceive
the switch that receives it. Drop such packets instead of mirroring them.
CC: David Tsai <dtsai@nicira.com>
NIC-401.
Diffstat (limited to 'vswitchd')
| -rw-r--r-- | vswitchd/vswitch.xml | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/vswitchd/vswitch.xml b/vswitchd/vswitch.xml index 6199938fe..a9fa4cfc6 100644 --- a/vswitchd/vswitch.xml +++ b/vswitchd/vswitch.xml @@ -1656,6 +1656,37 @@ <ref column="output_vlan"/>, replacing any existing tag; when it is sent out an implicit VLAN port, the frame will not be tagged. This type of mirroring is sometimes called RSPAN.</p> + <p> + The following destination MAC addresses will not be mirrored to a + VLAN to avoid confusing switches that interpret the protocols that + they represent: + </p> + <dl> + <dt><code>01:80:c2:00:00:00</code></dt> + <dd>IEEE 802.1D Spanning Tree Protocol (STP).</dd> + + <dt><code>01:80:c2:00:00:01</code></dt> + <dd>IEEE Pause frame.</dd> + + <dt><code>01:80:c2:00:00:0<var>x</var></code></dt> + <dd>Other reserved protocols.</dd> + + <dt><code>01:00:0c:cc:cc:cc</code></dt> + <dd> + Cisco Discovery Protocol (CDP), VLAN Trunking Protocol (VTP), + Dynamic Trunking Protocol (DTP), Port Aggregation Protocol (PAgP), + and others. + </dd> + + <dt><code>01:00:0c:cc:cc:cd</code></dt> + <dd>Cisco Shared Spanning Tree Protocol PVSTP+.</dd> + + <dt><code>01:00:0c:cd:cd:cd</code></dt> + <dd>Cisco STP Uplink Fast.</dd> + + <dt><code>01:00:0c:00:00:00</code></dt> + <dd>Cisco Inter Switch Link.</dd> + </dl> <p><em>Please note:</em> Mirroring to a VLAN can disrupt a network that contains unmanaged switches. Consider an unmanaged physical switch with two ports: port 1, connected to an end host, and port 2, |