Tuesday 26 November 2013

Configuring a Cisco Access Server

Real World Application:

This lab will teach you how to configure a Cisco access server, can be used to access all of your Cisco lab equipment from a single point of administration.


Often times, companies will use for network access server in a rack of Cisco equipment direct console access, which will allow remote administrators overloaded router and scheduling, and booting into ROM monitor mode check the boot configuration of a remote password recovery, image recovery, and access control lists.

Lab Prerequisites:

  • Complete Lab 1.2 before attempting this laboratory or opens the current Cisco access server console session.
  • Make sure that the access server asynchronous wires to the venerable device. Example;
Lab Objectives:

  • For your preferences, access to the server is assigned a host name.
  • Loopback interface is configured to use a reverse Telnet session.
  • Correct row inserted into their respective devices configured on the local reverse Telnet to the loopback interface IP hosts. See, for example, the lab prerequisites.
  • Prevent asynchronous lines with access to an EXEC session to the server.
  • Transport entered in asynchronous online configuring Telnet Protocol.
  • Optional – to prevent reverse Telnet session timeout on asynchronous lines.
Lab Instruction:

Step 1 : Assign a Hostname to the Access Server of your preference.

Router>enable
Router#configure terminal

Enter configuration commands, one per   line.  End with CNTL/Z

Router(config)#hostname Access_Server
Access_Server(config)#

Step 2 : Configure a loopback interface for use in reverse telnet sessions.

Access_Server(config)#interface loopback 0
Access_Server(config-if)#ip address 10.10.10.10 255.255.255.255
Access_Server(config-if)#exit
Access_Server(config)#

Step 3 : Configure the local host IP, loopback0 interface and reverse Telnet dear asynchronous line. To view the available line of digital distribution for your platform on the show line command from global configuration.

Access_Server(config)#ip host r1 2001 10.10.10.10
Access_Server(config)#ip host r2 2002 10.10.10.10
Access_Server(config)#ip host r3 2003 10.10.10.10
Access_Server(config)#ip host r4 2004 10.10.10.10
Access_Server(config)#ip host r5 2005 10.10.10.10
Access_Server(config)#ip host r6 2006 10.10.10.10
Access_Server(config)#ip host sw1 2007 10.10.10.10
Access_Server(config)#ip host sw2 2008 10.10.10.10
Access_Server(config)#ip host sw3 2009 10.10.10.10

Step 4 : Prohibit the async lines from establishing an EXEC session with the access server.

Access_Server(config)#line 1 16
Access_Server(config-line)#no exec

Step 5 : Configure the transport input protocol on the async lines to Telnet.

Access_Server(config-line)#transport input telnet

Step 6 : Optional – Prevent reverse telnet sessions on the Async lines from timing-out.

Access_Server(config-line)#exec-timeout 0 0
Access_Server(config-line)#end
Access_Server#

To exit this session use the key stroke combination Ctrl + Shift + 6 then X Executing this key stroke combination will take you back to your Access Servers CLI.

Access Server#r1

Trying r1 (10.10.10.10, 2001)... Open

% Please answer 'yes' or 'no'.

Would you like to enter the initial configuration dialog? [yes/no]:

Access Server#

You will have several commands available for troubleshooting and Diagnostics. As shown in the show hosts command is as follows;

Access_Server#show host
Default domain is not set
Name/address lookup uses domain service

Codes: UN - unknown, EX - expired, OK - OK,   ?? - revalidate
            temp - temporary, perm - permanent
            NA - Not Applicable None - Not defined

Host                    Port       Flags          Age  Type   Address(es)

r1                      2001       (perm, OK)    0        IP      10.10.10.10
r2                      2002       (perm, OK)    0        IP      10.10.10.10
r3                      2003       (perm, OK)    0        IP      10.10.10.10
r4                      2004       (perm, OK)    0        IP      10.10.10.10
r5                      2005       (perm, OK)    0        IP      10.10.10.10
sw1                     2006     (perm, OK)    0        IP      10.10.10.10
sw1                     2007     (perm, OK)    0        IP      10.10.10.10
sw3                     2008     (perm, OK)    0        IP      10.10.10.10

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