ECS3510-26P_Management Guide R02
Table Of Contents
- About This Guide
- Contents
- Figures
- Tables
- Getting Started
- Web Configuration
- Using the Web Interface
- Basic Management Tasks
- Displaying System Information
- Displaying Hardware/Software Versions
- Configuring Support for Jumbo Frames
- Displaying Bridge Extension Capabilities
- Managing System Files
- Setting the System Clock
- Configuring the Console Port
- Configuring Telnet Settings
- Displaying CPU Utilization
- Displaying Memory Utilization
- Resetting the System
- Interface Configuration
- VLAN Configuration
- Address Table Settings
- Spanning Tree Algorithm
- Congestion Control
- Class of Service
- Quality of Service
- VoIP Traffic Configuration
- Security Measures
- AAA Authorization and Accounting
- Configuring User Accounts
- Web Authentication
- Network Access (MAC Address Authentication)
- Configuring HTTPS
- Configuring the Secure Shell
- Access Control Lists
- ARP Inspection
- Filtering IP Addresses for Management Access
- Configuring Port Security
- Configuring 802.1X Port Authentication
- IP Source Guard
- DHCP Snooping
- DoS Protection
- Basic Administration Protocols
- IP Configuration
- IP Services
- Multicast Filtering
- Command Line Interface
- Using the Command Line Interface
- General Commands
- System Management Commands
- SNMP Commands
- Remote Monitoring Commands
- Authentication Commands
- User Accounts
- Authentication Sequence
- RADIUS Client
- TACACS+ Client
- AAA
- Web Server
- Telnet Server
- Secure Shell
- 802.1X Port Authentication
- dot1x default
- dot1x eapol-pass-through
- dot1x system-auth-control
- dot1x intrusion-action
- dot1x max-req
- dot1x operation-mode
- dot1x port-control
- dot1x re-authentication
- dot1x timeout quiet-period
- dot1x timeout re-authperiod
- dot1x timeout supp-timeout
- dot1x timeout tx-period
- dot1x re-authenticate
- dot1x identity profile
- dot1x max-start
- dot1x pae supplicant
- dot1x timeout auth-period
- dot1x timeout held-period
- dot1x timeout start-period
- show dot1x
- Management IP Filter
- General Security Measures
- Port Security
- Network Access (MAC Address Authentication)
- network-access aging
- network-access mac-filter
- mac-authentication reauth-time
- network-access dynamic-qos
- network-access dynamic-vlan
- network-access guest-vlan
- network-access link-detection
- network-access link-detection link-down
- network-access link-detection link-up
- network-access link-detection link-up-down
- network-access max-mac-count
- network-access mode mac-authentication
- network-access port-mac-filter
- mac-authentication intrusion-action
- mac-authentication max-mac-count
- clear network-access
- show network-access
- show network-access mac-address-table
- show network- access mac-filter
- Web Authentication
- DHCP Snooping
- IP Source Guard
- ARP Inspection
- ip arp inspection
- ip arp inspection filter
- ip arp inspection log-buffer logs
- ip arp inspection validate
- ip arp inspection vlan
- ip arp inspection limit
- ip arp inspection trust
- show ip arp inspection configuration
- show ip arp inspection interface
- show ip arp inspection log
- show ip arp inspection statistics
- show ip arp inspection vlan
- Denial of Service Protection
- Access Control Lists
- Interface Commands
- Link Aggregation Commands
- Port Mirroring Commands
- Rate Limit Commands
- Automatic Traffic Control Commands
- Threshold Commands
- SNMP Trap Commands
- snmp-server enable port-traps atc broadcast-alarm- clear
- snmp-server enable port-traps atc broadcast-alarm-fire
- snmp-server enable port-traps atc broadcast-control- apply
- snmp-server enable port-traps atc broadcast-control- release
- snmp-server enable port-traps atc multicast-alarm- clear
- snmp-server enable port-traps atc multicast-alarm-fire
- snmp-server enable port-traps atc multicast-control- apply
- snmp-server enable port-traps atc multicast-control- release
- ATC Display Commands
- Address Table Commands
- Spanning Tree Commands
- spanning-tree
- spanning-tree cisco-prestandard
- spanning-tree forward-time
- spanning-tree hello-time
- spanning-tree max-age
- spanning-tree mode
- spanning-tree pathcost method
- spanning-tree priority
- spanning-tree mst configuration
- spanning-tree transmission-limit
- max-hops
- mst priority
- mst vlan
- name
- revision
- spanning-tree bpdu-filter
- spanning-tree bpdu-guard
- spanning-tree cost
- spanning-tree edge- port
- spanning-tree link-type
- spanning-tree loopback-detection
- spanning-tree loopback-detection action
- spanning-tree loopback-detection release-mode
- spanning-tree loopback-detection trap
- spanning-tree mst cost
- spanning-tree mst port-priority
- spanning-tree port-priority
- spanning-tree root-guard
- spanning-tree spanning-disabled
- spanning-tree loopback-detection release
- spanning-tree protocol-migration
- show spanning-tree
- show spanning-tree mst configuration
- VLAN Commands
- Class of Service Commands
- Quality of Service Commands
- Multicast Filtering Commands
- IGMP Snooping
- ip igmp snooping
- ip igmp snooping proxy-reporting
- ip igmp snooping querier
- ip igmp snooping router-alert-option- check
- ip igmp snooping router-port-expire- time
- ip igmp snooping tcn-flood
- ip igmp snooping tcn-query-solicit
- ip igmp snooping unregistered-data- flood
- ip igmp snooping unsolicited-report- interval
- ip igmp snooping version
- ip igmp snooping version-exclusive
- ip igmp snooping vlan general-query- suppression
- ip igmp snooping vlan immediate- leave
- ip igmp snooping vlan last-memb- query-count
- ip igmp snooping vlan last-memb- query-intvl
- ip igmp snooping vlan mrd
- ip igmp snooping vlan proxy-address
- ip igmp snooping vlan query-interval
- ip igmp snooping vlan query-resp- intvl
- ip igmp snooping vlan static
- show ip igmp snooping
- show ip igmp snooping mrouter
- show ip igmp snooping group
- Static Multicast Routing
- IGMP Filtering and Throttling
- Multicast VLAN Registration
- IGMP Snooping
- LLDP Commands
- lldp
- lldp holdtime-multiplier
- lldp med-fast-start- count
- lldp notification-interval
- lldp refresh-interval
- lldp reinit-delay
- lldp tx-delay
- lldp admin-status
- lldp basic-tlv management-ip- address
- lldp basic-tlv port-description
- lldp basic-tlv system-capabilities
- lldp basic-tlv system-description
- lldp basic-tlv system-name
- lldp dot1-tlv proto-ident
- lldp dot1-tlv proto-vid
- lldp dot1-tlv pvid
- lldp dot1-tlv vlan-name
- lldp dot3-tlv link-agg
- lldp dot3-tlv max-frame
- lldp med-location civic-addr
- lldp med-notification
- lldp med-tlv ext-poe
- lldp med-tlv inventory
- lldp med-tlv location
- lldp med-tlv med-cap
- lldp med-tlv network-policy
- lldp notification
- show lldp config
- show lldp info local-device
- show lldp info remote-device
- show lldp info statistics
- Domain Name Service Commands
- DHCP Commands
- IP Interface Commands
- Appendices
- Glossary
- Command List
- Index
C
HAPTER
13
| Security Measures
ARP Inspection
– 330 –
ARP INSPECTION
ARP Inspection is a security feature that validates the MAC Address
bindings for Address Resolution Protocol packets. It provides protection
against ARP traffic with invalid MAC-to-IP address bindings, which forms
the basis for certain “man-in-the-middle” attacks. This is accomplished by
intercepting all ARP requests and responses and verifying each of these
packets before the local ARP cache is updated or the packet is forwarded to
the appropriate destination. Invalid ARP packets are dropped.
ARP Inspection determines the validity of an ARP packet based on valid
IP-to-MAC address bindings stored in a trusted database – the DHCP
snooping binding database (see "DHCP Snooping Global Configuration" on
page 362). This database is built by DHCP snooping if it is enabled on
globally on the switch and on the required VLANs. ARP Inspection can also
validate ARP packets against user-configured ARP access control lists
(ACLs) for hosts with statically configured addresses (see "Configuring an
ARP ACL" on page 327).
COMMAND USAGE
Enabling & Disabling ARP Inspection
◆ ARP Inspection is controlled on a global and VLAN basis.
◆ By default, ARP Inspection is disabled both globally and on all VLANs.
■
If ARP Inspection is globally enabled, then it becomes active only on
the VLANs where it has been enabled.
■
When ARP Inspection is enabled globally, all ARP request and reply
packets on inspection-enabled VLANs are redirected to the CPU and
their switching behavior handled by the ARP Inspection engine.
■
If ARP Inspection is disabled globally, then it becomes inactive for
all VLANs, including those where inspection is enabled.
■
When ARP Inspection is disabled, all ARP request and reply packets
will bypass the ARP Inspection engine and their switching behavior
will match that of all other packets.
■
Disabling and then re-enabling global ARP Inspection will not affect
the ARP Inspection configuration of any VLANs.
■
When ARP Inspection is disabled globally, it is still possible to
configure ARP Inspection for individual VLANs. These configuration
changes will only become active after ARP Inspection is enabled
globally again.
◆ The ARP Inspection engine in the current firmware version does not
support ARP Inspection on trunk ports.