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Презентация была опубликована 10 лет назад пользователемГаля Соломатина
1 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v Implementing Inter-VLAN Routing Describing Routing Between VLANs
2 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v Inter-VLAN Routing with External Router Single trunk link carries traffic for multiple VLANs to and from router.
3 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v Inter-VLAN Routing External Router Configuration Commands Configure on subinterface encapsulation dot1Q (or isl) 10 ip address Verify show vlan 10 show ip route
4 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v Inter-VLAN Routing on External Router: 802.1Q Trunk Link
5 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v Inter-VLAN Routing on External Router: ISL Trunk Link
6 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v Verifying Inter-VLAN Routing The ping command tests connectivity to remote hosts.
7 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v Verifying the Inter-VLAN Routing Configuration Router#show ip interface brief Displays the current IP configuration per VLAN Router#show ip route Displays IP route table information Router#show vlan Displays IP address on interfaces and current state of interface
8 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v Explaining Multilayer Switching
9 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v Layer 2 Switch Forwarding Process
10 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v Logical Packet Flow for a Multilayer Switch
11 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v Rewritten IP Unicast Packet IP Unicast Frame and Packet Rewrite Incoming IP Unicast Packet
12 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v CAM Table Requires an exact match on all bits Matching is a binary operation: 0 or 1 Provides very high- speed lookups
13 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v TCAM Table Matches only significant values Matches based on three values: 0, 1, or X (either) Masks used to wildcard some content fields
14 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v Summary A router on a stick can be used to route between VLANs using either ISL or 802.1Q as the trunking protocol. A router on a stick requires subinterfaces, one for each VLAN. Verify inter-VLAN routing by generating IP packets between two subnets. Multilayer switches can forward traffic at both Layer 2 and Layer 3. Multilayer switches rewrite the Layer 2 and Layer 3 header using tables held in hardware.
15 © 2006 Cisco Systems, Inc. All rights reserved. BCMSN v
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