Brocade Communications Systems ServerIron ADX 12.4.00a - Manual (Page 55)

ServerIron ADX Security Guide 41
53-1002440-03
Traffic segmentation
1
Traffic segmentation using the use-session-for-vip-mac command
By default, as long as there is a session match, packets with a destination IP address of a VIP are
processed regardless of whether the destination MAC is addressed to the ServerIron ADX or not.
With the server use-session-for-vip-mac command configured, only packets with a destination MAC
address of the ServerIron ADX are processed. Packets with a destination IP address of a VIP but a
destination MAC address not belonging to the ServerIron ADX are treated as pass-through traffic.
This feature is useful in traffic segmentation scenarios such as that shown in Figure 3. In the
example, packets entering the ServerIron ADX from rs-domain1 bound for vs-domain2 would, by
default, be switched at the ServerIron ADX to go directly to rs-domain2. If the server
use-session-for-vip-mac command is configured on the ServerIron ADX, the packets are sent up to
the firewall where they are subject to the security settings before being sent back down to the
ServerIron ADX for forwarding to the VIP.
FIGURE 3 Traffic Segmentation
This feature is configured as shown in the following.
ServerIron(config)# server use-session-for-vip-mac
Syntax: [no] server use-session-for-vip-mac
ServerIron ADX
VLAN 20
vs-domain1: 192.168.32.10
link 1
e1 e2
e1 e2
Firewall
VLAN 40
e4 e4
link1
link 2
vs-domain2: 192.168.33.10
rs-domain1:
192.168.32.11
GW: 192.168.32.1 rs-domain2:
192.168.33.11
GW: 192.168.33.1
IP: 192.168.32.1 IP: 192.168.33.1