lldptool-evb

lldptool(8)                          Linux                         lldptool(8)



NAME
       evb - Show / manipulate EVB TLV configuration

SYNOPSIS
       lldptool -t -g ncb -i ethx -V evbCfg -c enableTx

       lldptool -T -g ncb -i ethx -V evbCfg -c enableTx=[yes|no]

       lldptool -t -g ncb -i ethx -V evbCfg -c fmode

       lldptool -T -g ncb -i ethx -V evbCfg -c fmode=[bridge|reflectiverelay]

       lldptool -t -g ncb -i ethx -V evbCfg -c capabilities

       lldptool -T -g ncb -i ethx -V evbCfg -c capabilities=[rte|ecp|vdp|none]

       lldptool -t -g ncb -i ethx -V evbCfg -c rte

       lldptool -T -g ncb -i ethx -V evbCfg -c rte=[<rte>]

       lldptool -t -g ncb -i ethx -V evbCfg -c vsis

       lldptool -T -g ncb -i ethx -V evbCfg -c vsis=[<number of vsis>]


DESCRIPTION
       The EVB TLV is a TLV to announce the station and bridge's edge virtual
       bridging (evb) capabilities and request the bridge forwarding mode. If
       both sides have agree on edge control protocol (ECP), VSI discovery
       protocol (VDP) capabilities, both sides can exchange VDP TLV using ECP
       frames.  The vsis parameter will set the maximum number of VSIs and
       show the number of currently configured VSIs.


ARGUMENTS
       enableTx
              Enables the EVB TLV to be transmitted

       fmode  shows or sets the forwarding mode between bridge (default) or
              reflectiverelay (RR).

       capabilities
              shows or sets the local capabilities that are announced to the
              adjacent switch in the TLV. This parameter will accept any
              combination of rte, vdp or ecp, separated by ",". Use the
              keyword "none" if you do not want to set any capabilities.

       rte    shows or set the local run time exponent (RTE). The RTE will be
              used as the base for the timing of the ECP and VDP protocols.

       vsis   shows or sets the number of virtual station interfaces (VSIs)
              that are announced to the adjacent switch in the TLV. This
              parameter expects a number between 0 and 65535.


Theory of Operation
       The EVB TLV is used to announce and exchange supported parameters
       between the station and an adjacent switch. The TLV uses the nearest
       customer bridge agent.

       If "reflectiverelay" is set as forwarding mode, the switch will allow
       "reflection" of frames coming from different sources at the same port
       back to the port. This will allow communication between virtual
       machines on the same host via the switch.

       The capabilities parameter is used to set RTE, ECP and VDP support. VDP
       TLVs in ECP frames can only be exchanged if both sides agree on ECP and
       VDP as capabilities. RTE will be used as the base timing parameter for
       ECP and VDP.


EXAMPLE & USAGE
       Display locally configured values for eth8
              lldptool -t -g ncb -i eth8 -V evbCfg

       Display remotely configured values for eth8
              lldptool -n -g ncb -t -i eth8 -V evbCfg

       Display wether evb tlv is configured for tx on eth8
              lldptool -t -g ncb -i eth8 -V evbCfg -c enableTx

       Display the currently requested forwarding mode for eth8
              lldptool -t -g ncb -i eth8 -V evbCfg -c fmode

       Set the forwarding mode to reflective relay
              lldptool -T -g ncb -i eth8 -V evbCfg -c fmode=reflectiverelay

       Display the currently configured capabilities
              lldptool -t -g ncb -i ethx -V evbCfg -c capabilities

       Set the locally possible capabilities to RTE, ECP and VDP
              lldptool -T -g ncb -i ethx -V evbCfg -c capabilities=rte,ecp,vdp

       Resets the locally possible capabilities to "none"
              lldptool -T -g ncb -i ethx -V evbCfg -c capabilities=none

       Display the locally configured value for RTE
              lldptool -t -g ncb -i ethx -V evbCfg -c rte

       Set the value for RTE
              lldptool -T -g ncb -i ethx -V evbCfg -c rte=[<rte>]

       Display the configured maximum number of VSIs
              lldptool -t -g ncb -i ethx -V evbCfg -c vsis

       Set the maximum number of VSIs
              lldptool -T -g ncb -i ethx -V evbCfg -c vsis=[<number of vsis>]



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.
       EVB TLVs on the wire can be decoded with wireshark > v1.6.


SEE ALSO
       lldptool-vdp(8), lldptool(8), lldpad(8)


AUTHOR
       Jens Osterkamp



open-lldp                        February 2010                     lldptool(8)