Cisco HWIC-4ESW and HWIC-D-9ESW EtherSwitch Interface Cards
How to Configure EtherSwitch HWICs
96
Book Title
IP defines a hierarchical naming scheme that allows a device to be identified by its location or domain.
Domain names are pieced together with periods (.) as the delimiting characters. For example, Cisco
Systems is a commercial organization that IP identifies by a
com
domain name, so its domain name is
cisco.com
. A specific device in this domain, the FTP system, for example, is identified as
ftp.cisco.com
.
To track domain names, IP has defined the concept of a domain name server (DNS), the purpose of which
is to hold a cache (or database) of names mapped to IP addresses. To map domain names to IP addresses,
you must first identify the host names and then specify a name server and enable the DNS, the Internet’s
global naming scheme that uniquely identifies network devices.
Specifying the Domain Name
You can specify a default domain name that the software uses to complete domain name requests. You
can specify either a single domain name or a list of domain names. When you specify a domain name,
any IP host name without a domain name has that domain name appended to it before being added to the
host table.
Specifying a Name Server
You can specify up to six hosts that can function as a name server to supply name information for the
DNS.
Enabling the DNS
If your network devices require connectivity with devices in networks for which you do not control name
assignment, you can assign device names that uniquely identify your devices within the entire
internetwork. The Internet’s global naming scheme, the DNS, accomplishes this task. This service is
enabled by default.
Enabling Switch Port Analyzer
You can monitor traffic on a given port by forwarding incoming and outgoing traffic on the port to
another port in the same VLAN. A Switch Port Analyzer (SPAN) port cannot monitor ports in a different
VLAN, and a SPAN port must be a static-access port. Any number of ports can be defined as SPAN ports,
and any combination of ports can be monitored. SPAN is supported for up to 2 sessions.
Follow the steps below to enable SPAN.
SUMMARY STEPS
1.
enable
2.
configure terminal
3.
monitor session
session-id
{
destination
|
source
} {
interface
|
vlan
interface-id
|
vlan-id
}} [
,
|
-
|
both
|
tx
|
rx
]
4.
end
DETAILED STEPS
