Management and Configuration Guide (Includes ACM xl) 2005-12

6-28 ProCurve Secure Access 700wl Series Management and Configuration Guide
Configuring the Network
See Appendix B, “Filter Expression Syntax” for a description of the tcpdump syntax.
The following are the specifications in tcpdump syntax for the predefined bridging options:
Note:
You must also have a matching Allowed Traffic filter defined and enabled in the appropriate
Access Policies to allow this type of traffic from a client. Allowed Traffic filters are predefined for CDP,
WNMP, and Appletalk, so you only need enable them for the appropriate Access Policies. For IPX and SLP
you must create an Allowed Traffic Filter with the same tcpdump string as is used for the bridging option.
Client Cross-VLAN Communication
By default, clients are not able to communicate with clients on a different VLAN. Click this to enable
clients to communicate across VLANs.
Enable Proxy ARPs for Clients on Same Downlink VLANs
Select this to enable Proxy ARPs for clients that are on the same downlink VLANs.
Client Polling
After a client has been idle for a specified length of time (by default 30 seconds), the Access Controller
polls the client with an ARP request to determine if it is still connected. If the Access Controller does not
Other: Enables bridging of other Layer 2 traffic as specified in the text field that
follows.
You can create a traffic specification using arbitrary tcpdump syntax.
Any traffic specifications (tcpdump-enabled packets) you enter here are
in addition to those enabled by checking the options described above.
Table 6-6. Tcpdump syntax for predefined bridging options
Traffic to enable tcpdump syntax
CDP ether [12:2] <= 1514 and ether dst 01:00:0c:cc:cc:cc
Wireless Network Access
Protocol
ether [12:2] = 0x8781 and ether[0:4] = 0x01a0f8f0
Appletalk ether[12:2] = 0x809b or ether[12:2] = 0x80f3 or (ether[12:2] <= 1500 and
(ether[14:4] = 0xaaaa0308 and ether[18:4] = 0x0007809b) or (ether[14:4] =
0xaaaa0300 and ether[18:4] = 0x000080f3))
IPX/802.3 (Ethernet Raw) ether[12:2] < 0x05ee and (ether[14:2] = 0xffff)
IPX/802.3 (Ethernet) ether[12:2] < 0x05ee and (ether[17:2] = 0xffff or ether[22:2] = 0xffff)
IPX/802.2 (LLC AND SNAP) (ether[12:2] < 0x05ee and ether[14:2] = 0xaaaa and ether[16] = 0x03) or
(ether[12:2] < 0x05dd and ether[14:2] = 0xaa08 and ether[16] = 0x00)
IPX/Ethernet II encapsulation
(TypeII)
ether[12:2] = 0x8037 or ether[12:2] = 0x8137
SLP udp dst port 427 and dst host 224.0.1.22
Table 6-5. Bridging options
Protocol Description