Cisco Wide Area Application Engine 612 Bedienungsanleitung PDF herunterladen (Seite 4)

78 Chapter 4: Network Integration and Interception

In addition to the normal interface information, such as IP address, Ethernet address, and

counters, each interface also has a set of ﬂags. These ﬂags are the same ﬂags that can be

seen in the output of the ifconﬁg command in Linux. The two most important ﬂags are UP

and RUNNING. The presence of the UP ﬂag indicates that the interface is administratively

enabled. The presence of the RUNNING ﬂag indicates that line protocol on the interface is

operational.

Link Aggregation Using EtherChannel

To increase the available interface bandwidth for a WAE, Cisco WAAS supports EtherChannel.

EtherChannel allows for the grouping of multiple physical interfaces to create a single

“virtual” interface. The virtual interface, which functions as a single interface, has the

aggregate bandwidth of the available physical interfaces in the channel group. EtherChannel is

useful when the output from a single WAE exceeds the physical limitations of a single

interface. For example, some remote sites may only have 100-Mbps LAN connections

available, whereas the trafﬁc from a single WAE can easily exceed 100 Mbps. In these

situations, using EtherChannel to group both physical WAE interfaces together provides

200 Mbps of usable interface bandwidth.

In addition to increasing the available interface bandwidth, the EtherChannel has automatic

failure and recovery detection based on the link state of each individual interface. In the

event of a single interface failure, trafﬁc continues to pass over the remaining interface in

Broadcast address:10.88.81.15

Netmask:255.255.255.240

Maximum Transfer Unit Size:1500

Metric:1

Packets Received: 966044

Input Errors: 0

Input Packets Dropped: 0

Input Packets Overruns: 0

Input Packets Frames: 0

Packet Sent: 1046794

Output Errors: 0

Output Packets Dropped: 0

Output Packets Overruns: 0

Output Packets Carrier: 0

Output Queue Length:1000

Collisions: 0

Base address:0x2000

Flags:UP BROADCAST RUNNING MULTICAST

Mode: autoselect, full-duplex, 100baseTX

AST6-CCO-02#

Example 4-2 WAE show interface Command Output (Continued)

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Cisco Wide Area Application Engine 612 Bedienungsanleitung Seite 4