Ip-Mac-Port Binding; Acl Mode - D-Link Xstack DGS-3600 Series User Manual

IP-MAC-Port Binding

The IP network layer uses a four-byte address. The Ethernet link layer uses a six-byte MAC address. Binding these two address
types together allows the transmission of data between the layers. The primary purpose of IP-MAC binding is to restrict the access
to a switch to a number of authorized users. Only the authorized client can access the Switch's port by checking the pair of IP-
MAC addresses with the pre-configured database. If an unauthorized user tries to access an IP-MAC binding enabled port, the
system will block the access by dropping its packet. The maximum number of IP-MAC binding entries is dependant on chip
capability (e.g. the ARP table size) and storage size of the device. For the xStack DGS-3600 Series switches, the maximum
number of IP-MAC Binding entries is 500. The creation of authorized users can be manually configured by CLI or Web. The
function is port-based, meaning a user can enable or disable the function on the individual port.

ACL Mode

Due to some special cases that have arisen with the
IP-MAC binding, this Switch has been equipped
with a special ACL Mode for IP-MAC Binding,
which should alleviate this problem for users. When
enabled in the IP-MAC Binding Port window, the
Switch will create two entries in the Access Profile
Table as shown below. The entries may only be
created if there are at least two Access Profile IDs
available on the Switch. If not, when the ACL
Mode is enabled, an error message will be prompted
to the user. When the ACL Mode is enabled, the
Switch will only accept IP packets from a created
entry in the IP-MAC Binding Setting window. All
others will be discarded.
To view the particular configurations associated with these two entries, click their corresponding View button, which will display
the following:
Figure 6- 47. Access Profile Entry Display windows for IP-MAC ACL Mode Enabled Entries
These two entries cannot be modified or deleted using the Access Profile Table. The user may only remove these two entries by
disabling the ACL Mode in the IP-MAC Binding Port window.
Also, rules will be created for every port on the Switch. To view the ACL rule configurations set for the ACL mode, click the
corresponding modify button of the entry in the Access Profile Table, which will produce a window similar to the example to the
right. The user may view the configurations on a port-by-port basis by clicking the View button under the Display heading of the
corresponding port entry. These entries cannot be modified or deleted, and new rules cannot be added. Yet, these windows will
offer vital information to the user when configuring other access profile entries.
xStack DGS-3600 Series Layer 3 Gigabit Ethernet Managed Switch
Figure 6- 48. Access Rule Table windows for IP-MAC Binding rule
Figure 6- 46. Access Profile Table window
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