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 whether 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