Catalyst 2948G-L3 and Catalyst 4908G-L3 Software Feature and Configuration Guide IOS Software, Release 12.0(10)W5(18e)
Configuration Examples
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Catalyst 2948G-L3 and Catalyst 4908G-L3 Software Feature and Configuration Guide IOS Software, Release 12.0(10)W5(18e)
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Preface
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Overview of Layer 3 Switching and Software Features
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Before You Begin
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Initial Switch Router Configurations
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Configuring Interfaces
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Configuring Virtual LAN Encapsulation
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Configuring Networking Protocols
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Configuring Bridging
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Configuring Etherchannel
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Configuring Quality of Service
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Configuring Switching Database Manager
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Configuring Access Control Lists
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Command Reference
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Error Messages
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Configuration Examples
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Cisco IOS Commands Not Supported in Layer 3 Switching Software
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Using Technical Support
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Table Of Contents
Example of a Catalyst 2948G-L3 with ISL and VLAN
Example of a Catalyst 2948G-L3 with HSRP
Example of a Catalyst 4908G-L3 with Bridging
Example of a Catalyst 2948G-L3 with IP Uplink Redirect
Example of a Catalyst 2948G-L3 with QoS
Configuration Examples
This appendix provides real-world examples of Layer 3 switching configurations. This appendix contains the following sections:
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Example of a Catalyst 2948G-L3 with ISL and VLAN
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Note
Example of a Catalyst 2948G-L3 with ISL and VLAN
This example configuration for a Catalyst 2948G-L3 switch router focuses on Inter-Switch Link (ISL) and virtual LANs (VLANs), integrated routing and bridging (IRB) using a Bridge-Group Virtual Interface (BVI), Fast EtherChannel (FEC), and Gigabit EtherChannel (GEC). The Cisco proprietary ISL allows any Fast Ethernet port to be configured as a trunk. This example also includes multicast routing.
version 12.0no service padservice timestamps debug uptimeservice timestamps log uptimeno service password-encryption!hostname cat2948G-L3!no logging consoleenable secret 5 $1$1$1$1$1$1$1$1$1$enable password changme!sdm size ipx-bvi-network 32sdm size ip-adjacency 1056sdm size ipx-node 1024sdm size ip-prefix 8000sdm size ipx-network 2048sdm size ip-mcast 2000sdm size udp-flooding 512sdm size l2-switching 5000sdm autolearnip subnet-zerono ip domain-lookupip multicast-routingipx routing 0050.3e7b.c800bridge irb!!!interface Port-channel1ip address 1.200.0.1 255.255.0.0no ip redirectsno ip unreachablesno ip directed-broadcastipx network 1200 encapsulation ARPAhold-queue 300 in!interface FastEthernet1no ip addressno ip directed-broadcast!interface FastEthernet1.100encapsulation isl 100ip address 1.1.0.1 255.255.0.0no ip redirectsno ip directed-broadcastip pim dense-modeipx network 1001 encapsulation ARPA!interface FastEthernet2no ip addressno ip redirectsno ip directed-broadcast!interface FastEthernet2.200encapsulation isl 200ip address 1.2.0.1 255.255.0.0no ip redirectsno ip directed-broadcastip pim dense-modeipx network 1002 encapsulation ARPA!interface FastEthernet3no ip addressno ip directed-broadcast!interface FastEthernet4no ip addressno ip directed-broadcastbridge-group 10!interface FastEthernet5no ip addressno ip redirectsno ip unreachablesno ip directed-broadcastbridge-group 10!interface FastEthernet6no ip addressno ip directed-broadcastbridge-group 10!interface FastEthernet7no ip addressno ip directed-broadcastbridge-group 10!interface FastEthernet8no ip addressno ip directed-broadcastshutdown!<information deleted>interface FastEthernet47no ip addressno ip directed-broadcastshutdown!interface FastEthernet48ip address 24.0.4.4 255.0.0.0no ip directed-broadcastshutdownduplex fullspeed 10!interface GigabitEthernet49no ip addressno ip directed-broadcastchannel-group 1!interface GigabitEthernet50no ip addressno ip directed-broadcastchannel-group 1!interface BVI10ip address 1.3.0.1 255.255.0.0no ip directed-broadcastno ip route-cache cefipx network 1003 encapsulation ARPA!router eigrp 100network 1.0.0.0!ip classless!!bridge 10 protocol ieeebridge 10 route ipbridge 10 route ipx!line con 0exec-timeout 0 0transport input noneline aux 0line vty 0 4password changmelogin!endExample of a Catalyst 2948G-L3 with HSRP
This example configuration for a Catalyst 2948G-L3 switch router focuses on the Hot Standby Router Protocol (HSRP), which provides high network availability. HSRP makes network topology changes transparent to the host. The active Layer 3 switch router is monitored by other standby routers, and as soon as an active router becomes unavailable, the standby router takes its place.
Helper addresses facilitate connectivity by forwarding certain broadcasts to a target server. In this example, an IP Helper address identifies the Dynamic Host Configuration Protocol (DHCP) server IP address. This configuration also includes configuration for IP multicast, Distance Vector Multicast Routing Protocol (DVMRP), tunneling, and Protocol Independent Multicast (PIM) in sparse mode.
version 12.0no service padservice timestamps debug uptimeservice timestamps log uptimeno service password-encryption!hostname cat2948g-L3!no logging consoleenable secret 5 $1$1$1$1$1$1$1$1$1$1$1$enable password changeme!sdm size ipx-bvi-network 32sdm size ip-adjacency 1056sdm size ipx-node 1024sdm size ip-prefix 8000sdm size ipx-network 2048sdm size ip-mcast 2000sdm size udp-flooding 512sdm size l2-switching 5000sdm autolearnip subnet-zerono ip domain-lookupipx routing 0050.3e7b.c800!!!interface FastEthernet1ip address 172.69.95.197 255.255.255.192no ip directed-broadcast!interface FastEthernet1description Bldg 1 Network Aip address 172.69.93.1 255.255.255.192ip helper-address 172.69.2.74ip helper-address 172.69.2.123ip helper-address 172.69.30.31ip helper-address 172.69.2.121ip helper-address 172.71.84.140ip helper-address 172.69.67.35no ip redirectsno ip directed-broadcastip pim sparse-modestandby priority 200standby preemptstandby ip 172.69.93.6!interface FastEthernet2ip address 172.69.90.1 255.255.255.0ip helper-address 172.69.2.74ip helper-address 172.69.2.123ip helper-address 172.69.30.31ip helper-address 172.69.2.121ip helper-address 172.71.84.140ip helper-address 172.69.67.35no ip redirectsno ip directed-broadcastip pim sparse-modestandby priority 200standby preemptstandby ip 172.69.90.6!interface FastEthernet3ip address 172.69.91.1 255.255.255.0ip helper-address 172.69.2.74ip helper-address 172.69.2.123ip helper-address 172.69.30.31ip helper-address 172.69.2.121ip helper-address 172.71.84.140ip helper-address 172.69.67.35no ip redirectsno ip directed-broadcastip pim sparse-modestandby priority 200standby preemptstandby ip 172.69.91.6!interface FastEthernet4description Building 2 Network Aip address 172.69.88.1 255.255.255.192ip helper-address 172.69.2.74ip helper-address 172.69.2.123ip helper-address 172.69.30.31ip helper-address 172.69.2.121ip helper-address 172.71.84.140ip helper-address 172.69.67.35no ip redirectsno ip directed-broadcastip pim sparse-modestandby priority 200standby preemptstandby ip 172.69.88.6!interface FastEthernet5description Building 3 Network Aip address 172.69.89.1 255.255.255.192ip helper-address 172.69.2.74ip helper-address 172.69.2.123ip helper-address 172.69.30.31ip helper-address 172.69.2.121ip helper-address 172.71.84.140ip helper-address 172.69.67.35no ip redirectsno ip directed-broadcastip pim sparse-modestandby priority 200standby preemptstandby ip 172.69.89.6!interface FastEthernet6no ip addressno ip directed-broadcast!<information deleted>interface FastEthernet47no ip addressno ip directed-broadcastshutdown!interface FastEthernet48ip address 24.0.4.4 255.0.0.0no ip directed-broadcastshutdownduplex full speed 10!interface GigabitEthernet49no ip addressno ip directed-broadcastshutdown!interface GigabitEthernet50no ip addressno ip directed-broadcastshutdown!!router eigrp 109network 172.69.0.0no auto-summary!ip pim accept-rp auto-rpip pim accept-rp 172.69.10.13logging 172.69.43.19snmp-server community 8540 RO 98snmp-server community Cisco RW 99snmp-server host 172.69.43.19 traps publictacacs-server host 172.69.2.210tacacs-server host 172.69.35.87tacacs-server timeout 15!line con 0password 7 071B245F5Atransport input noneline aux 0password 7 071B245F5Aline vty 0exec-timeout 0 0login authentication adminline vty 1exec-timeout 0 0login authentication adminlength 57line vty 2 4exec-timeout 0 0login authentication admin!endExample of a Catalyst 4908G-L3 with Bridging
This example configuration for the Catalyst 4908G-L3 switch router shows the eight Gigabit Ethernet ports as part of one bridge group.
version 12.0no service padservice timestamps debug uptimeservice timestamps log uptimeno service password-encryption!hostname cat4908G-L3!no logging consoleenable secret 5 $1$1$1$1$1$1$1$1$1$enable password changme!sdm size ipx-bvi-network 32sdm size ip-adjacency 1056sdm size ipx-node 1024sdm size ip-prefix 8000sdm size ipx-network 2048sdm size ip-mcast 2000sdm size l2-switching 5000sdm autolearn!!interface GigabitEthernet1no ip addressno ip directed-broadcastbridge-group 1!interface GigabitEthernet2no ip addressno ip directed-broadcastbridge-group 1<information deleted>interface GigabitEthernet7no ip addressno ip directed-broadcastbridge-group 1!interface GigabitEthernet8no ip addressno ip directed-broadcastbridge-group 1!no ip routingbridge 1 protocol ieee!line con 0exec-timeout 0 0transport input noneline aux 0line vty 0 4password changmelogin!endExample of a Catalyst 2948G-L3 with IP Uplink Redirect
This example configuration for the Catalyst 2948G-L3 switch router shows all IP traffic between Fast Ethernet ports will be redirected to G49 and switched via the upstream router 200.10.49.2.
version 12.0no service padservice timestamps debug uptimeservice timestamps log uptimeno service password-encryption!hostname Router!!ip subnet-zeroip uplink-redirect!!!!interface FastEthernet1ip address 200.10.1.1 255.255.255.0no ip directed-broadcast!interface FastEthernet2ip address 200.10.2.1 255.255.255.0no ip directed-broadcast!interface FastEthernet3ip address 200.10.3.1 255.255.255.0no ip directed-broadcast!interface FastEthernet4ip address 200.10.4.1 255.255.255.0no ip directed-broadcast!interface FastEthernet5ip address 200.10.5.1 255.255.255.0no ip directed-broadcast!interface FastEthernet6ip address 200.10.6.1 255.255.255.0no ip directed-broadcastshutdown<information deleted>interface FastEthernet45ip address 200.10.45.1 255.255.255.0no ip directed-broadcast!interface FastEthernet46ip address 200.10.46.1 255.255.255.0no ip directed-broadcast!interface FastEthernet47ip address 200.10.47.1 255.255.255.0no ip directed-broadcast!interface FastEthernet48ip address 200.10.48.1 255.255.255.0no ip directed-broadcast!interface GigabitEthernet49ip address 200.10.49.1 255.255.255.0no ip directed-broadcast!interface GigabitEthernet50ip address 200.10.50.1 255.255.255.0no ip directed-broadcast!ip classlessip route 0.0.0.0 0.0.0.0 200.10.49.2!!line con 0transport input noneline aux 0line vty 0 4login!endupExample of a Catalyst 2948G-L3 with QoS
This example configuration for the Catalyst 2948G-L3 switch router shows interface FastEthernet1 input rate-limiting at 1000000 bits per second and a burst of 1000 bytes. The interface FastEthernet2 is configured for traffic-shaping rate-limiting at 1000000 bits per second and a burst of 1000 bits.
!version 12.0no service padservice timestamps debug uptimeservice timestamps log uptimeno service password-encryption!hostname Domino-vp!!ip subnet-zero!!interface FastEthernet1ip address 1.1.1.1 255.0.0.0no ip directed-broadcastrate-limit input 1000000 1000!interface FastEthernet2ip address 2.2.2.2 255.0.0.0no ip directed-broadcasttraffic-shape rate 1000000 1000!interface FastEthernet3ip address 3.3.3.3 255.0.0.0no ip directed-broadcastshutdown!<information deleted>!interface FastEthernet48no ip addressno ip directed-broadcastshutdown!interface GigabitEthernet49no ip addressno ip directed-broadcastshutdown!interface GigabitEthernet50no ip addressno ip directed-broadcastshutdown!ip classless!!line con 0transport input noneline aux 0line vty 0 4!end
