1-6
Cisco ASA Series CLI Configuration Guide
Chapter 1 Completing Interface Configuration (Transparent Mode)
Guidelines and Limitations
Firewall Mode Guidelines
•
You can configure up to 8 bridge groups in single mode or per context in multiple mode. Note that
you must use at least 1 bridge group; data interfaces must belong to a bridge group.
Note
Although you can configure multiple bridge groups on the ASA 5505, the restriction of 2
data interfaces in transparent mode on the ASA 5505 means you can only effectively use 1
bridge group.
•
Each bridge group can include up to 4 interfaces.
•
For IPv4, a management IP address is required for each bridge group for both management traffic
and for traffic to pass through the ASA.
Unlike routed mode, which requires an IP address for each interface, a transparent firewall has an
IP address assigned to the entire bridge group. The ASA uses this IP address as the source address
for packets originating on the ASA, such as system messages or AAA communications. In addition
to the bridge group management address, you can optionally configure a management interface for
some models; see the
“Management Interface” section on page 1-2
for more information.
The management IP address must be on the same subnet as the connected network. You cannot set
the subnet to a host subnet (255.255.255.255). The ASA does not support traffic on secondary
networks; only traffic on the same network as the management IP address is supported. See the
“Configuring Bridge Groups” section on page 1-8
for more information about management IP
subnets.
•
For IPv6, at a minimum you need to configure link-local addresses for each interface for through
traffic. For full functionality, including the ability to manage the ASA, you need to configure a
global IPv6 address for each bridge group.
•
For multiple context mode, each context must use different interfaces; you cannot share an interface
across contexts.
•
For multiple context mode, each context typically uses a different subnet. You can use overlapping
subnets, but your network topology requires router and NAT configuration to make it possible from
a routing standpoint.
Failover Guidelines
Do not finish configuring failover interfaces with the procedures in this chapter. See the
Active/Standby Failover” section on page 1-7
or the
“Configuring Active/Active Failover” section on
to configure the failover and state links. In multiple context mode, failover interfaces are
configured in the system configuration.
IPv6 Guidelines
•
Supports IPv6.
•
No support for IPv6 anycast addresses in transparent mode.
Summary of Contents for 5505 - ASA Firewall Edition Bundle
Page 28: ...Glossary GL 24 Cisco ASA Series CLI Configuration Guide ...
Page 61: ...P A R T 1 Getting Started with the ASA ...
Page 62: ......
Page 219: ...P A R T 2 Configuring High Availability and Scalability ...
Page 220: ......
Page 403: ...P A R T 2 Configuring Interfaces ...
Page 404: ......
Page 499: ...P A R T 2 Configuring Basic Settings ...
Page 500: ......
Page 533: ...P A R T 2 Configuring Objects and Access Lists ...
Page 534: ......
Page 601: ...P A R T 2 Configuring IP Routing ...
Page 602: ......
Page 745: ...P A R T 2 Configuring Network Address Translation ...
Page 746: ......
Page 845: ...P A R T 2 Configuring AAA Servers and the Local Database ...
Page 846: ......
Page 981: ...P A R T 2 Configuring Access Control ...
Page 982: ......
Page 1061: ...P A R T 2 Configuring Service Policies Using the Modular Policy Framework ...
Page 1062: ......
Page 1093: ...P A R T 2 Configuring Application Inspection ...
Page 1094: ......
Page 1191: ...P A R T 2 Configuring Unified Communications ...
Page 1192: ......
Page 1333: ...P A R T 2 Configuring Connection Settings and QoS ...
Page 1334: ......
Page 1379: ...P A R T 2 Configuring Advanced Network Protection ...
Page 1380: ......
Page 1475: ...P A R T 2 Configuring Modules ...
Page 1476: ......
Page 1549: ...P A R T 2 Configuring VPN ...
Page 1550: ......
Page 1965: ...P A R T 2 Configuring Logging SNMP and Smart Call Home ...
Page 1966: ......
Page 2059: ...P A R T 2 System Administration ...
Page 2060: ......
Page 2098: ...1 8 Cisco ASA Series CLI Configuration Guide Chapter 1 Troubleshooting Viewing the Coredump ...
Page 2099: ...P A R T 2 Reference ...
Page 2100: ......