![background image](http://html.mh-extra.com/html/cisco/5505-asa-firewall-edition-bundle/5505-asa-firewall-edition-bundle_cli-configuration-manual_18624409.webp)
1-5
Cisco ASA Series CLI Configuration Guide
Chapter 1 Starting Interface Configuration (ASA 5510 and Higher)
Information About Starting ASA 5510 and Higher Interface Configuration
Redundant Interfaces
A logical redundant interface consists of a pair of physical interfaces: an active and a standby interface.
When the active interface fails, the standby interface becomes active and starts passing traffic. You can
configure a redundant interface to increase the ASA reliability. This feature is separate from device-level
failover, but you can configure redundant interfaces as well as device-level failover if desired.
Redundant Interface MAC Address
The redundant interface uses the MAC address of the first physical interface that you add. If you change
the order of the member interfaces in the configuration, then the MAC address changes to match the
MAC address of the interface that is now listed first. Alternatively, you can assign a MAC address to the
redundant interface, which is used regardless of the member interface MAC addresses (see the
“Configuring the MAC Address and MTU” section on page 1-10
or the
“Configuring Multiple Contexts”
). When the active interface fails over to the standby, the same MAC address is
maintained so that traffic is not disrupted.
EtherChannels
An 802.3ad EtherChannel is a logical interface (called a port-channel interface) consisting of a bundle
of individual Ethernet links (a channel group) so that you increase the bandwidth for a single network.
A port channel interface is used in the same way as a physical interface when you configure
interface-related features.
You can configure up to 48 EtherChannels.
This section includes the following topics:
•
Channel Group Interfaces, page 1-5
•
Connecting to an EtherChannel on Another Device, page 1-5
•
Link Aggregation Control Protocol, page 1-6
•
•
EtherChannel MAC Address, page 1-8
Channel Group Interfaces
Each channel group can have eight active interfaces. Note that you can assign up to 16 interfaces to a
channel group. While only eight interfaces can be active, the remaining interfaces can act as standby
links in case of interface failure.
All interfaces in the channel group must be the same type and speed. The first interface added to the
channel group determines the correct type and speed.
The EtherChannel aggregates the traffic across all the available active interfaces in the channel. The port
is selected using a proprietary hash algorithm, based on source or destination MAC addresses, IP
addresses, TCP and UDP port numbers and vlan numbers.
Connecting to an EtherChannel on Another Device
The device to which you connect the ASA EtherChannel must also support 802.3ad EtherChannels; for
example, you can connect to the Catalyst 6500 switch.
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: ......