Cisco 2901 User Manual

100
Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
OL-20696-04
Chapter Configuring Backup Data Lines and Remote Management
Configuring Backup Interfaces
Enabling Auto-Detect
The Auto-Detect feature is enabled if media-type is not configured. This feature automatically detects
which media is connected and links up. If both media are connected, whichever media comes up first is
linked up.
Note The Auto-Detect feature only works with 1 GigE SFPs. This feature does not detect 100M SFPs.
Use the no media-type command in interface configuration mode to enable the Auto-Detect feature.
To configure the Auto-Detect feature, follow these steps, beginning in global configuration mode.
SUMMARY STEPS
1. configure terminal
2. interface gigabitethernet slot/port
3. no media-type
Step 3
media-type sfp
Example:
Router(config-if)# media-type sfp
Router(config-if)#
Example:
Router(config-if)# media-type rj45
Router(config-if)#
Designates SFP port as the primary media.
OR
Designates RJ-45 as the primary media.
Step 4
media-type sfp auto-failover
Example:
Router(config-if)# media-type sfp
auto-failover
Router(config-if)#
Example:
Router(config-if)# media-type rj45
auto-failover
Router(config-if)#
Configures the port with SFP as the primary
media for automatic failover from SFP to
RJ-45.
OR
Configures the port with RJ-45 as the primary
media for automatic failover from RJ-45 to
SFP.
Step 5
end Exits to global configuration mode.
Command Purpose

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