Pseudowire switching TLV

The format of the pseudowire switching TLV is as follows:

    0                   1                   2                   3
    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |1|0|     pw sw TLV  (0x096D)   |     pseudowire sw TLV  Length         |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |     Type      |    Length     |    Variable Length Value      |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                         Variable Length Value                 |
   |                             "                                 |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

• PW sw TLV Length

  Specifies the total length of all the following pseudowire switching point TLV fields in octets.

• Type

  Encodes how the Value field is to be interpreted.

• Length

  Specifies the length of the Value field in octets.

• Value

  Octet string of Length octets that encodes information to be interpreted as specified by the Type field.

Pseudowire Switching Point Sub-TLVs

The following are details specific to pseudowire switching point sub-TLVs:

• pseudowire ID of last pseudowire segment traversed

  This sub-TLV type contains a pseudowire ID in the format of the pseudowire ID

• pseudowire switching point description string

  An optional description string of text up to 80 characters

• IP address of pseudowire switching point

• The IP V4 or V6 address of the pseudowire switching point. This is an optional sub-TLV

• MH VCCV capability indication