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

open-lldp                                         February 2010                                      lldptool(8)