Cisco 2921 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
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Verifying the Ethernet Data Plane Loopback Configuration
Use the show ethernet loopback permitted command to display all the permitted interfaces which run
Ethernet Data Plane Loopback sessions:
router# show ethernet loopback permitted
Interface Direction
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GigabitEthernet0/0/0/0 External
GigabitEthernet0/0/0/1.100 Internal
GigabitEthernet 0/1.200 External, Internal
Use the show ethernet loopback active command to view active sessions:
Router# show ethernet loopback active interface GigabitEthernet 0/1.200
Local: GigabitEthernet0/1.200, ID 1
--------------------------------------------------------------------------------
Direction: Internal
Time out: 2 hours
Time left: 00:01:17
Status: Active
Filters:
Dot1ad: 100-200
Dot1q: Any
Source MAC Address: aaaa.bbbb.cccc
Destination MAC Address: Any
Ethertype: 0x8902
Class of Service: Any
LLC-OUI: Any
Local: GigabitEthernet0/1.200, ID 2
--------------------------------------------------------------------------------
Direction: External
Time out: 10 minutes
Time left: 00:00:00
Status: Stopping
Filters:
Dot1q: 500
Second-dot1q: 200
Source MAC Address: Any
Destination MAC Address: Any
Ethertype: Any
Class of Service: 4
LLC-OUI: Any
For each loopback session listed, this information is displayed:
• Header containing the Interface name and session ID, which uniquely identify the local loopback
session,
• Direction which specifies the direction of the loopback,
• Time out – the time out period specified when the loopback was started,
• Time left – the amount of time left until the loopback session is automatically stopped,
• Status – the status of the loopback session,
• Filters – details of the filters specified when the loopback session was started. Similar to the start
CLI, only the filters supported by the platform are displayed.

Cisco 2921 Specifications

General

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, IEEE 802.3u
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Ethernet interface type	Gigabit Ethernet
Product color	Black
Rack capacity	2U
USB version	2.0
RS-232 ports	1
USB ports quantity	2
Ethernet LAN (RJ-45) ports	3
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
Firewall security	Cisco IOS
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 %
AC input voltage	100 - 240 V
Power source type	AC
AC input frequency	47 - 63 Hz
Safety	UL 60950-1, CAN/CSA C22.2 No. 60950-1, EN 60950-1, AS/NZS 60950-1, IEC 60950-1
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	469.9 mm
Width	438.2 mm
Height	88.9 mm
Weight	13200 g