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
Support for Switch Virtual Interfaces (SVI) on ISR G2 Metro Ethernet BD
Figure 1 Re-directing the traffic from a SV1 onto the BD and vice versa
Once the SV1 is connected, packets coming into a switch port is re-directed to the SVI and onto the BD.
On entering the BD, the source MAC address is learned and the packet is bridged. In the opposite
direction, packets coming onto the BD from an EVC via the switch port are directed out the SVI.
Restrictions for SVI support on BDs
• Only one SVI may be associated with a BD.
• There is no EVC (i.e. service instance) configuration on an SVI.
• All packets on the BD, including those from EVCs, should be tagged, with the VLAN tag specifying
the VLAN id of the SVI.
• Only access port configurations are supported.
Configuring SVI as Access Port
First you configure the switch port to add an access port SVI to a BD. After this you need to define the
associated VLAN interface.
Note The BD id does not have to match the VLAN id in the dot1q tag, but all packets on the BD must be tagged
with that VLAN number. So an EVC could be configured in which the BD id matches the VLAN id.
Configuration Examples to add an Access Port SVI to a BD
This example shows how to add an Access Port SVI to a BD:
interface GigabitEthernet4
switchport access vlan 40
Bridge-Domain
EVC
EVCEVC
SVI
Switch
364528

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