There's another Cisco-private encapsulation of BPDUs.

[tcpdump] / llc.h

diff --git a/llc.h b/llc.h
index faa72561c9a972ce9be2e42c3389132db5eb7bd8..660466994f5559ae46011324ac57546e56764e2c 100644 (file)
--- a/llc.h
+++ b/llc.h
@@ -106,6 +106,7 @@
 #define        PID_CISCO_DTP           0x2004  /* Cisco Dynamic Trunk Protocol */
 #define        PID_CISCO_UDLD          0x0111  /* Unidirectional Link Detection */
 #define        PID_CISCO_PVST          0x010b  /* Per VLAN Spanning Tree+ and RPVST+ */
+#define        PID_CISCO_VLANBRIDGE    0x010c  /* "VLAN Bridge", according to Wireshark */
 
 /*
  * PIDs for use with OUI_RFC2684.