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Task 6Managing IP Addresses by Using DNS
About Managing IP Addresses
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Basic Dial NMS Implementation Guide
Creating a Primary Forwar d Zone
To create a domain (or forward zone) and include all forward mapping (the “A” records) for the domain,
follow these steps:
Step 1
Create a domain and include all forward mapping (the “A” records) by entering the
zone
command with
the
create
option:
nrcmd> zone the.net create primary file=the.net.zone.txt
To create new subnets by using the CLI, import a BIND zone definition file, which can be edited by
using an ASCI text editor. The following example shows an edited BIND file.
@ IN SOA onionring.the.net. netadmin.the.net. (
2000071600 ; serial number
3600 ; Refresh 1 hours
1800 ; Retry 30 minutes
86400 ; Expire 24 hours
86400 ; TTL 24 hours
)
IN NS onionring.the.net.
doc-rtr58-01 IN A 172.21.101.20
doc-rtr54-01 IN A 172.21.101.21
doc-rtr53-01 IN A 172.21.101.22
doc-rtr53-05 IN A 172.21.101.23
doc-3810a-01 IN A 172.21.10.14
doc-3810d-01 IN A 172.21.10.15
doc-ubr7246-01 IN A 172.21.10.16
doc-switch-02 IN A 172.21.10.17
Step 2
Verify that the primary zone was created by entering the
zone
command with the
listRR
option:
nrcmd> zone the.net listRR
100 Ok
Static Resource Records
@ IN SOA onionring.the.net.
netadmin.the.net.0
@ IN NS onionring.the.net.
doc-rtr58-01 IN A 172.21.101.20
doc-rtr54-01 IN A 172.21.101.21
doc-rtr53-01 IN A 172.21.101.22
doc-rtr53-05 IN A 172.21.101.23
(Truncated for brevity)
Dynamic Resource Records
Creating an IP Tracker Web Page
An IP tracker web page:
Provides web access to the IP database that is managed by Cisco Network Registrar.
Retrieves current IP address block assignments from a DNS server.
Uses two CGI scripts to provide a web-enabled look into DNS for each zone.