Wireshark-bugs: [Wireshark-bugs] [Bug 12631] BGP L2VPN EVPN Update with route type 2 incorrectly

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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Wed, 20 Jul 2016 14:32:35 +0000

Comment # 4 on bug 12631 from 
You should be able to find out by using the EVPN NLRI Length field:

+---------------------------------------+
|    Route Type (1 octet)               |
+---------------------------------------+
|     Length (1 octet)                  |
+---------------------------------------+
|  RD (8 octets)                        |
+---------------------------------------+
|Ethernet Segment Identifier (10 octets)|
+---------------------------------------+
|  Ethernet Tag ID (4 octets)           |
+---------------------------------------+
|  MAC Address Length (1 octet)         |
+---------------------------------------+
|  MAC Address (6 octets)               |
+---------------------------------------+
|  IP Address Length (1 octet)          |
+---------------------------------------+
|  IP Address (0, 4, or 16 octets)      |
+---------------------------------------+
|  MPLS Label1 (3 octets)               |
+---------------------------------------+
|  MPLS Label2 (0 or 3 octets)          |
+---------------------------------------+

The rest of the fields for route-type=2 have fixed sizes, except for the IP
address, which has its own IP address length field to let you find out the
exact size for that field.

Regards,

Diego

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