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132 Nokia Network Voyager for IPSO 4.0 Reference Guide
3. Click the ATM ARP Entries link.
Dynamic ATM ARP entries appear in a table at the bottom of the page.
4. Click the Delete check box next to the dynamic ATM ARP entry to delete.
Click Apply.
Note
Deleting a dynamic entry triggers a transmission of an InATMARP request on the PVC. If the
remote end responds and its IP address is not changed, a new dynamic ATM ARP entry
identical to the deleted one appears in the table immediately.
Transparent Mode
Use transparent mode to allow your IPSO appliance to behave like a layer 2 device such as a
bridge. Benefits of this type of network configuration include being able to maintain your
current local area network configuration or maintain your existing IP address with your ISP.
Note
Transparent mode inter-operates with Check Point FireWall-1. There is no special code or
software required for the bridging functionality to be supported in FireWall-1.
Using transparent mode, you configure Ethernet interfaces on the firewall router to behave like
ports on a bridge. The interfaces then forward traffic using layer 2 addressing. You can configure
some interfaces to use transparent mode while other interfaces on the same platform are
configured normally. Traffic between transparent mode interfaces is inspected at layer 2 while
traffic between normal interfaces, or between transparent and normal interfaces, is inspected at
layer 3.
Limitations
Transparent mode has the following limitations.
Transparent mode supports only Ethernet interfaces (10/100/1000 Mbps).
Transparent mode does not provide full-fledged bridging functionality such as loop
detection or spanning tree.
The IP2250 appliance does not support transparent mode.
Transparent mode is not supported in a cluster environment. You cannot use transparent
mode on interfaces that participate in an IPSO cluster.
Transparent mode is supported with VRRP.
Interfaces configured for transparent mode do not pass non-IP traffic. In fact, all non-IP
traffic is simply dropped at the Ethernet input layer before it reaches the transparent mode
layer which only registers to receive IP traffic.