Switching – A Process of using the MAC address on LAN is called Layer 2 Switching.
Layer 2 Switching is the process of using hardware address of devices on a LAN to segment a network.
Switching breaks up large collision domains into smaller ones and that a collision domain is a network
segment with two or more devices sharing the same bandwidth.
Switching – A Process of using the MAC address on LAN is called Layer 2 Switching.
Layer 2 Switching is the process of using hardware address of devices on a LAN to segment a network.
Switching breaks up large collision domains into smaller ones and that a collision domain is a network
segment with two or more devices sharing the same bandwidth.
tep 2 Display the switch MAC address .pdffurqanfazl2
tep 2: Display the switch MAC address table. Console into your switch and view the MAC
address table before and after running network communication lests with ping. a) Establish a
console connection to your switch and enter privileged EXEC mode. b) In privileged EXEC
mode, type the show mac address-table command and press Enter. Switch-?\# show mac
address-table Even though no network communication has been initialed across the network (i.e.,
no use of ping), the switch may have learned MAC addresses from its connection to the PC and
the other switch. Are there any MAC addresses recorded in the MAC address table? What MAC
addresses are recorded in the table? To which switch ports are they mapped, and to which
devices do they belong? Ignore MAC addresses that are mapped to the CPU. If you had yet to
previously record the MAC addresses of network devices in Step 1, how could you tell which
devices the MAC addresses belong to, using only the output from the show mac address-table
command? Does it work in all scenarios? Step 3: Clear your Switch MAC address table and
display the MAC address table again. a. In privileged EXEC mode, type the clear mac address-
table dynamic command and press Enter.
Addressing Table Objectives Part 1: Build and Configure the Network Part 2: Examine the
Switch MAC Address Table Background / Scenario The purpose of a Layer 2 LAN switch is to
deliver Ethernet frames to host devices on the local network. The switch records host MAC
addresses that are visible on the network and maps those MAC addresses to its own Ethernet
switch ports. This process is called building the MAC address table. When a switch receives a
frame from a PC, it examines its source and destination MAC addresses. The source MAC
address is recorded and mapped to the switch port from which it arrived. Then, the destination
MAC address is looked up in the MAC address table. If the destination MAC address is a known
address, the frame is forwarded out of the corresponding switch port associated with that MAC
address. If the MAC address is unknown, the
c. From a console connection to your switch, enter the show mac address-table command. Has
the switch added additional MAC addresses to the MAC address table? If so, which addresses
and devices? d. From your PC, open a command prompt and retype arp - a. Does the ARP cache
have additional entries for all network devices that received pings? Reflection Question On
Ethernet networks, data is delivered to devices by their MAC addresses. For this to happen,
switches and PCs dynamically build ARP caches and MAC address tables. This process seems
easy with only a few computers on the network. What might be some of the challenges on more
extensive networks? Running-Config Output In privileged EXEC mode, type the show running-
configuration command and press Enter. Press the Space Bar until you get to the bottom of the
output. Copy all the configuration and paste it below.
Switch-?\# clear mac address-table dynamic .
tep 2 Display the switch MAC address .pdffurqanfazl2
tep 2: Display the switch MAC address table. Console into your switch and view the MAC
address table before and after running network communication lests with ping. a) Establish a
console connection to your switch and enter privileged EXEC mode. b) In privileged EXEC
mode, type the show mac address-table command and press Enter. Switch-?\# show mac
address-table Even though no network communication has been initialed across the network (i.e.,
no use of ping), the switch may have learned MAC addresses from its connection to the PC and
the other switch. Are there any MAC addresses recorded in the MAC address table? What MAC
addresses are recorded in the table? To which switch ports are they mapped, and to which
devices do they belong? Ignore MAC addresses that are mapped to the CPU. If you had yet to
previously record the MAC addresses of network devices in Step 1, how could you tell which
devices the MAC addresses belong to, using only the output from the show mac address-table
command? Does it work in all scenarios? Step 3: Clear your Switch MAC address table and
display the MAC address table again. a. In privileged EXEC mode, type the clear mac address-
table dynamic command and press Enter.
Addressing Table Objectives Part 1: Build and Configure the Network Part 2: Examine the
Switch MAC Address Table Background / Scenario The purpose of a Layer 2 LAN switch is to
deliver Ethernet frames to host devices on the local network. The switch records host MAC
addresses that are visible on the network and maps those MAC addresses to its own Ethernet
switch ports. This process is called building the MAC address table. When a switch receives a
frame from a PC, it examines its source and destination MAC addresses. The source MAC
address is recorded and mapped to the switch port from which it arrived. Then, the destination
MAC address is looked up in the MAC address table. If the destination MAC address is a known
address, the frame is forwarded out of the corresponding switch port associated with that MAC
address. If the MAC address is unknown, the
c. From a console connection to your switch, enter the show mac address-table command. Has
the switch added additional MAC addresses to the MAC address table? If so, which addresses
and devices? d. From your PC, open a command prompt and retype arp - a. Does the ARP cache
have additional entries for all network devices that received pings? Reflection Question On
Ethernet networks, data is delivered to devices by their MAC addresses. For this to happen,
switches and PCs dynamically build ARP caches and MAC address tables. This process seems
easy with only a few computers on the network. What might be some of the challenges on more
extensive networks? Running-Config Output In privileged EXEC mode, type the show running-
configuration command and press Enter. Press the Space Bar until you get to the bottom of the
output. Copy all the configuration and paste it below.
Switch-?\# clear mac address-table dynamic .
LAN Switching and Wireless: Ch2 - Basic Switch Concepts and ConfigurationAbdelkhalik Mosa
This chapter starts with discussing the key elements of ethernet/802.3 networks such as CSMA/CD, communication using unicast, multicast, and broadcast, the ethernet frame, MAC address, duplex settings, half-duplex and full-duplex, switch port settings, auto-MDIX, and the switch MAC table.
After that, there is a discussion about the design considerations for Ethernet networks such as bandwidth, throughput, goodput, collision domains, broadcast domains, LAN segmentation, and network latency.
Switch forwarding modes: store and forward and cut-through and the difference between symmetric and asymmetric switching.
Memory Buffering: port-based memory and shared memory.
The difference between layer 3 switches and routers.
Cisco switch CLI commands, accessing the history, switch boot sequence and recovering from system crash.
Managing the MAC address table, dynamic MAC addresses and static MAC addresses and backing configuration files to a TFTP server.
Configuring switch passwords and password recovery, configuring telnet and SSH.
Common Security Attacks such as MAC address flooding, spoofing attacks, CDP attacks and telnet attacks.
Switch port security, sticky port security and security violation modes: protect, restrict and shutdown and verifying poert security
This chapter begins an examination of the flow of traffic in a modern network. It
examines some of the current network design models and the way LAN switches
build forwarding tables and use the MAC address information to efficiently
switch data between hosts.
Italy Agriculture Equipment Market Outlook to 2027harveenkaur52
Agriculture and Animal Care
Ken Research has an expertise in Agriculture and Animal Care sector and offer vast collection of information related to all major aspects such as Agriculture equipment, Crop Protection, Seed, Agriculture Chemical, Fertilizers, Protected Cultivators, Palm Oil, Hybrid Seed, Animal Feed additives and many more.
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Our Animal care category provides solutions on Animal Healthcare and related products and services, including, animal feed additives, vaccination
Meet up Milano 14 _ Axpo Italia_ Migration from Mule3 (On-prem) to.pdfFlorence Consulting
Quattordicesimo Meetup di Milano, tenutosi a Milano il 23 Maggio 2024 dalle ore 17:00 alle ore 18:30 in presenza e da remoto.
Abbiamo parlato di come Axpo Italia S.p.A. ha ridotto il technical debt migrando le proprie APIs da Mule 3.9 a Mule 4.4 passando anche da on-premises a CloudHub 1.0.
Gen Z and the marketplaces - let's translate their needsLaura Szabó
The product workshop focused on exploring the requirements of Generation Z in relation to marketplace dynamics. We delved into their specific needs, examined the specifics in their shopping preferences, and analyzed their preferred methods for accessing information and making purchases within a marketplace. Through the study of real-life cases , we tried to gain valuable insights into enhancing the marketplace experience for Generation Z.
The workshop was held on the DMA Conference in Vienna June 2024.
APNIC Foundation, presented by Ellisha Heppner at the PNG DNS Forum 2024APNIC
Ellisha Heppner, Grant Management Lead, presented an update on APNIC Foundation to the PNG DNS Forum held from 6 to 10 May, 2024 in Port Moresby, Papua New Guinea.
B cisco n3k_layer2_config_gd_503_u2_1_chapter_01101
1. Configuring the MAC Address Table
This chapter contains the following sections:
• Information About MAC Addresses, page 1
• Configuring MAC Addresses, page 1
• Verifying the MAC Address Configuration, page 3
Information About MAC Addresses
To switch frames between LAN ports, the switch maintains an address table. When the switch receives a
frame, it associates the media access control (MAcC) address of the sending network device with the LAN
port on which it was received.
The switch dynamically builds the address table by using the MAC source address of the frames received.
When the switch receives a frame for a MAC destination address not listed in its address table, it floods the
frame to all LAN ports of the same VLAN except the port that received the frame. When the destination
station replies, the switch adds its relevant MAC source address and port ID to the address table. The switch
then forwards subsequent frames to a single LAN port without flooding all LAN ports.
You can also enter a MAC address, which is termed a static MAC address, into the table. These static MAC
entries are retained across a reboot of the switch.
In addition, you can enter a multicast address as a statically configured MAC address. A multicast address
can accept more than one interface as its destination.
The address table can store a number of unicast and multicast address entries without flooding any frames.
The switch uses an aging mechanism, defined by a configurable aging timer, so if an address remains inactive
for a specified number of seconds, it is removed from the address table.
Configuring MAC Addresses
Configuring a Static MAC Address
You can configure MAC addresses for the switch. These addresses are static MAC addresses.
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2. You can also configure a static MAC address in interface configuration mode or VLAN configuration
mode.
Note
SUMMARY STEPS
1. switch# configure terminal
2. switch(config-)# mac-address-table static mac_address vlan vlan-id {drop | interface {type slot/port}
| port-channel number} [auto-learn]
3. (Optional) switch(config-)# no mac-address-table static mac_address vlan vlan-id
DETAILED STEPS
PurposeCommand or Action
Enters configuration mode.switch# configure terminalStep 1
Specifies a static address to add to the MAC address table.switch(config-)# mac-address-table static mac_address
vlan vlan-id {drop | interface {type slot/port} |
port-channel number} [auto-learn]
Step 2
If you enable the auto-learn option, the switch will update
the entry if the same MAC address is seen on a different
port.
(Optional)
Deletes the static entry from the MAC address table.
switch(config-)# no mac-address-table static
mac_address vlan vlan-id
Step 3
This example shows how to put a static entry in the MAC address table:
switch# configure terminal
switch(config)# mac-address-table static 12ab.47dd.ff89 vlan 3 interface ethernet 2/1
You can use the mac-address-table static command to assign a static MAC address to a virtual interface.
Configuring the Aging Time for the MAC Table
You can configure the amount of time that an entry (the packet source MAC address and port that packet
ingresses) remain in the MAC table. MAC aging time can be configured in either interface configuration mode
or in VLAN configuration mode.
If the Cisco Nexus 3000 switch is used as a Layer 2 or Layer 3 termination switch, Cisco recommends
that you set the mac-address-table aging-time to 1800 (higher than the default ARP aging time of 1500
seconds) on all VLANs.
Cisco Nexus 3000 switch does not support per-VLAN cam aging timers.
Note
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Configuring the MAC Address Table
Configuring the Aging Time for the MAC Table
3. SUMMARY STEPS
1. switch# configure terminal
2. switch(config)# mac-address-table aging-time seconds [vlan vlan_id]
DETAILED STEPS
PurposeCommand or Action
Enters global configuration mode.switch# configure terminalStep 1
Specifies the time before an entry ages out and is discarded from the
MAC address table.
switch(config)# mac-address-table
aging-time seconds [vlan vlan_id]
Step 2
The seconds range is from 0 to 1000000. The default is 1800 seconds.
Entering the value 0 disables the MAC aging. If a VLAN is not specified,
the aging specification applies to all VLANs.
This example shows how to set the aging time for entries in the MAC address table to 1800 seconds (30
minutes):
switch# configure terminal
switch(config) # mac-address-table aging-time 1800
switch(config) #
Clearing Dynamic Addresses from the MAC Table
You can clear all dynamic entries in the MAC address table.
PurposeCommand
Clears the dynamic address entries from the MAC
address table.
switch(config)# clear mac-address-table dynamic
{address mac-addr} {interface [type slot/port |
port-channel number} {vlan vlan-id}
This example shows how to clear the dynamic entries in the MAC address table:
switch# clear mac-address-table dynamic
Verifying the MAC Address Configuration
To display MAC address configuration information, perform one of these tasks:
PurposeCommand
Displays the MAC address aging time for all VLANs
defined in the switch.
switch# show mac-address-table aging-time
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Configuring the MAC Address Table
Clearing Dynamic Addresses from the MAC Table
4. PurposeCommand
Displays the contents of the MAC address table.switch# show mac-address-table
This example shows how to display the MAC address table:
switch# show mac-address-table
VLAN MAC Address Type Age Port
---------+-----------------+-------+---------+------------------------------
1 0018.b967.3cd0 dynamic 10 Eth1/3
1 001c.b05a.5380 dynamic 200 Eth1/3
Total MAC Addresses: 2
This example shows how to display the current aging time:
switch# show mac-address-table aging-time
Vlan Aging Time
----- ----------
1 300
13 300
42 300
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Configuring the MAC Address Table
Verifying the MAC Address Configuration
![You can also configure a static MAC address in interface configuration mode or VLAN configuration
mode.
Note
SUMMARY STEPS
1. switch# configure terminal
2. switch(config-)# mac-address-table static mac_address vlan vlan-id {drop | interface {type slot/port}
| port-channel number} [auto-learn]
3. (Optional) switch(config-)# no mac-address-table static mac_address vlan vlan-id
DETAILED STEPS
PurposeCommand or Action
Enters configuration mode.switch# configure terminalStep 1
Specifies a static address to add to the MAC address table.switch(config-)# mac-address-table static mac_address
vlan vlan-id {drop | interface {type slot/port} |
port-channel number} [auto-learn]
Step 2
If you enable the auto-learn option, the switch will update
the entry if the same MAC address is seen on a different
port.
(Optional)
Deletes the static entry from the MAC address table.
switch(config-)# no mac-address-table static
mac_address vlan vlan-id
Step 3
This example shows how to put a static entry in the MAC address table:
switch# configure terminal
switch(config)# mac-address-table static 12ab.47dd.ff89 vlan 3 interface ethernet 2/1
You can use the mac-address-table static command to assign a static MAC address to a virtual interface.
Configuring the Aging Time for the MAC Table
You can configure the amount of time that an entry (the packet source MAC address and port that packet
ingresses) remain in the MAC table. MAC aging time can be configured in either interface configuration mode
or in VLAN configuration mode.
If the Cisco Nexus 3000 switch is used as a Layer 2 or Layer 3 termination switch, Cisco recommends
that you set the mac-address-table aging-time to 1800 (higher than the default ARP aging time of 1500
seconds) on all VLANs.
Cisco Nexus 3000 switch does not support per-VLAN cam aging timers.
Note
Cisco Nexus 3000 Series NX-OS Layer 2 Switching Configuration Guide, Release 5.0(3)U2(1)
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Configuring the MAC Address Table
Configuring the Aging Time for the MAC Table](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)