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Hi,
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Vilius (2 Replies)
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lldptool(8) Linux lldptool(8)
NAME
vdp - Show / manipulate VDP TLV configuration
SYNOPSIS
lldptool -t -i ethx -V vdp -c enableTx
lldptool -T -i ethx -V vdp -c enableTx=[yes|no]
lldptool -t -i ethx -V vdp -c mode
lldptool -T -i ethx -V vdp -c mode=<mode>,<mgrid>,<typeid>,<typeidversion>,<instanceid>,<mac>,<vlan>
lldptool -t -i ethx -V vdp -c role
lldptool -T -i ethx -V vdp -c role=[station|bridge]
DESCRIPTION
The VSI discovery protocol (VDP) is NOT a TLV in the LLDP sense but rather a protocol to manage the association and deassociation of vir-
tual station interfaces (VSIs) between the station and an adjacent switch. VDP uses ECP as transport for VDP TLVs. An ECP frame may contain
multiple VDP TLVs. Each VDP TLVs contains a mode, typeid, version, instanceid, mac and vlan for a VSI.
ARGUMENTS
enableTx
Enables or disables VDP
mode shows or sets modes for VSIs with the following parameters:
<mode> mode (0=preassociate, 1=preassociate with RR, 2=associate, 3=deassociate)
<mgrid>
manager (database) id
<typeid>
VSI type id
<version>
VSI type id version
<instanceid>
VSI instance id
<format>
VDP filter info format
<mac> VSI mac address
<vlan> VSI vlan id
role shows or sets the role of the local machine to act as either station (default) or bridge.
Theory of Operation
The VDP protocol is used to pre-associate, associate or deassociate VSIs to and adjacent switch. Information about the VSIs is formatted
into VDP TLVs which are then handed to ECP for lower-level transport. Each ECP frame may contain multiple VDP TLVs.
Two ways to receive VSI information exist in llpdad: via netlink or with lldptool. netlink is used by libvirt to communicate VSIs to lld-
pad. lldptool can be used to associate/deassociate VSIs from the command line. This is especially helpful for testing purposes.
EXAMPLE & USAGE
Display if vdp is enabled on eth8
lldptool -t -i eth8 -V vdp -c enableTx
Enable vdp on eth8
lldptool -T -i eth8 -V vdp -c enableTx=yes
Display the currently configured VSIs for eth8
lldptool -t -i eth8 -V vdp -c mode
Associate a VSI on eth8
lldptool -T -i eth8 -V vdp -c mode=2,12,1193046,1,fa9b7fff-b0a0-4893-8e0e-beef4ff18f8f,2,52:54:00:C7:3E:CE,3
Display the locally configured role for VDP on eth8
lldptool -t -i eth8 -V vdp -c role
Set the local role for VDP on eth8
lldptool -T -i eth8 -V vdp -c role=bridge
SOURCE
o IEEE 802.1Qbg (http://www.ieee802.org/1/pages/802.1bg.html)
NOTES
Currently the code in lldpad reflects draft 0 of the upcoming standard. ECP/VDP TLVs on the wire can be decoded with wireshark > v1.8.
SEE ALSO
lldptool-evb(8), lldptool(8), lldpad(8)
AUTHOR
Jens Osterkamp
open-lldp February 2010 lldptool(8)