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 Configuring Ethernet Virtual Connection Bridge Domain
Ethernet Data Plane Loopback
Configuration Examples for Ethernet Data Plane Loopback
This example shows how to configure Ethernet Data Plane Loopback:
Router# configure
Router(config)# interface GigabitEthernet 0/1
Router((config-if-srv)# ethernet loopback permit external
This example shows how to start an Ethernet Data Plane Loopback:
Router# ethernet loopback start local interface gigabitEthernet 0/1
external
[source mac-address <addr>]
[destination mac-address <addr>]
[ether-type <etype>]
[{dot1q <vlan-ids> [second-dot1q <vlan-ids>] |
dot1ad <vlan-ids> [dot1q <vlan-ids>]}]
[cos <cos>]
[llc-oui <oui>]
[timeout {<length> | none}]
This example shows how to stop an Data Plane Loopback:
Router# ethernet loopback stop local interface <name> id <id>
This example shows how to extend an Ethernet Data Plane Loopback:
router# ethernet loopback extend local interface <name> id <id> length
Step 3
ethernet loopback permit {external |
internal}
Example:
Router(config-if-srv)# ethernet
loopback permit external
Configures ethernet loopback externally or internally on
an interface. External loopback allows loopback of traffic
from wire. Internal loopback allows loopback of traffic
from the bridge domain.
Step 4
end
or
commit
Example:
router(config-if-srv)# commit
Saves configuration changes.
• When you issue the end command, the system
prompts you to commit changes:
Uncommitted changes found, commit them before
exiting(yes/no/cancel)?
[cancel]:
– Entering yes saves configuration changes to the running
configuration file, exits the configuration session, and
returns the router to EXEC mode.
– Entering no exits the configuration session and returns
the router to EXEC mode without committing the
configuration changes.
– Entering cancel leaves the router in the current
configuration session without exiting or committing the
configuration changes.
• Use the commit command to save the configuration
changes to the running configuration file and remain
within the configuration session.
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