Cisco 2901 User Manual

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Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
Chapter Administering the Wireless Device
Configuring a System Name and Prompt
Default DNS Configuration
Table 3 describes the default DNS configuration.
Setting Up DNS
To set up the wireless device to use the DNS, follow these steps, beginning in privileged EXEC mode.
SUMMARY STEPS
1. configure terminal
2. ip domain-name name
3. ip name-server server-address1 [server-address2 ... server-address6]
4. ip domain-lookup
5. end
6. show running-config
7. copy running-config startup-config
DETAILED STEPS
Table 3 Default DNS Configuration
Feature Default Setting
DNS enable state Disabled.
DNS default domain name None configured.
DNS servers No name server addresses are configured.
Command Purpose
Step 1
configure terminal Enters global configuration mode.
Step 2
ip domain-name name Defines a default domain name that the software uses to complete unqualified
hostnames (names without a dotted-decimal domain name).
Do not include the initial period that separates an unqualified name from the
domain name.
At boot time, no domain name is configured. However, if the wireless device
configuration comes from a BOOTP or DHCP server, then the default domain
name might be set by the BOOTP or DHCP server (if the servers were
configured with this information).
Step 3
ip name-server server-address1
[server-address2 ...
server-address6]
Specifies the address of one or more name servers to use for name and address
resolution.
You can specify up to six name servers. Separate server addresses with a space.
The first server specified is the primary server. The wireless device sends DNS
queries to the primary server first. If that query fails, the backup servers are
queried.

Cisco 2901 Specifications

General

Operating altitude	0 - 3000 m
Non-operating altitude	0 - 4570 m
Storage temperature (T-T)	-40 - 70 °C
Operating temperature (T-T)	0 - 40 °C
Storage relative humidity (H-H)	5 - 95 %
Operating relative humidity (H-H)	10 - 85 %
Ethernet LAN	Yes
Cabling technology	10/100/1000BASE-T(X)
Networking standards	IEEE 802.1Q, IEEE 802.1ag, IEEE 802.3, IEEE 802.3ab, IEEE 802.3af, IEEE 802.3ah
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Ethernet interface type	Gigabit Ethernet
DHCP client	-
Routing protocols	BGP, EIGRP, OSPF
Supported protocols	IPv4, IPv6, IS-IS, IGMPv3, PIM SM, SSM, DVMRP, IPSec, GRE, BVD, MPLS, L2TPv3, PPP, MLPPP, MLFR, HDLC, RS-232, RS-449, X.21, V.35, EIA-530, PPPoE, ATM
USB version	2.0
RS-232 ports	1
Expansion slots	4 x EHWIC 2 x DSP 1 x ISM
Ethernet LAN (RJ-45) ports	2
Firewall security	Cisco IOS
Input current	1.5 A
AC input voltage	100 - 240 V
Power source type	AC
AC input frequency	47 - 63 Hz
Power consumption (typical)	40 W
Product color	Black
Rack capacity	1U
Safety	UL 60950-1, CAN/CSA C22.2 No. 60950-1, EN 60950-1, AS/NZS 60950-1, IEC 60950-1
Flash memory	256 MB
Internal memory	512 MB
Electromagnetic compatibility	47 CFR, ICES-003, EN55022, CISPR22, AS/NZS 3548, VCCI V-3, EN 300-386, EN 61000, EN 55024, CISPR 24EN50082-1

Weight and Dimensions

Depth	439.4 mm
Width	438.2 mm
Height	44.5 mm
Weight	6100 g