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3Com Switch 7750 Configuration Guide Guide

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HABP CONFIGURATION
Introduction to HABP With 802.1x enabled, a switch authenticates and then authorizes 802.1x-enabled
ports. Packets can be forwarded only by authorized ports. If ports connected to
the switch are not authenticated and authorized by 802.1x, their received packets
will be filtered. This means that users can no longer manage the attached
switches. To address this problem, 3Com authentication bypass protocol (HABP)
has been developed.
An HABP packet carries the MAC addresses of the attached switches with it. It can
bypass the 802.1x authentications when traveling between HABP-enabled
switches, through which management devices can obtain the MAC addresses of
the attached switches and thus the management of the attached switches is
feasible.
An HABP packet encapsulates the MAC address of the connected switch to a
given port. This allows HABP packets to bypass 802.1x authentication and to be
forwarded between HABP-enabled switches. Therefore, the management devices
can get the MAC addresses of their attached switches to manage them effectively.
HABP is implemented by HABP server and HABP client. Normally, an HABP server
sends HABP request packets regularly to HABP clients to collect the MAC
addresses of the attached switches. HABP clients respond to the HABP request
packets and forward the HABP request packets to lower-level switches. HABP
servers usually reside on management devices and HABP clients usually on
attached switches.
For ease of switch management, it is recommended that you enable HABP for
802.1x-enabled switches.
HABP Server
Configuration
With the HABP server launched, a management device sends HABP request
packets regularly to the attached switches to collect their MAC addresses. You
need also to configure the interval on the management device for an HABP server
to send HABP request packets.
Table 367 Configure an HABP server
Operation Command Description
Enter system view system-view -
Enable HABP habp enable
Required
HABP is enabled by default.