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#Cisco mac address range download#
In this lesson, we have learned an important lesson of multicast technology. Download an exhaustive MAC Address Vendor Database for your educational, business or enterprise needs. For another Multicast MAC, there are another 32 ip addresses certainly. This is tru for all these 32 ip addresses. These Multicast IP Addresses that can be used with this created MAC Address are given below:įor example like 224.255.0.1 multicast ip address, 230.127.0.1, 232.255.0.1, 238.255.0.1 ip addresses will also use the same MAC that we have produced. Here, with the 5th, 6th, 7th, 8th and 9th bits, 32 different Multicast IP Addresses can be written. So, 2^5, you can create 32 different IP address with this changable area.įor our example, the Multicast IP addresses that share the same Multicast MAC Address are showed below. And the remainning 5 bits in the middle can be any value. The last 23 bits are used for Multicast MAC Address. Here, we have 4 steps to produce this MAC address. from my 7200 in GNS3: FastEthernet0/0 is administratively down, line protocol is down Hardware is DEC21140, address is ca01.3cd1.0000 (bia ca01.3cd1. Because, there are 32 Multicast IP addresses that corresponds to a Multicast MAC Address. This will produce fairly concise output with the interface on one line, and the MAC indented below it.
There are 4 ranges of Locally Administered Address Ranges that can be used on a local network: x2-xx-xx-xx-xx-xx. Here the second-least-significant bit of the first octet of the address is a 1. It is 25 bits.Ĥ) Lastly, we will combine the fixed 25 bits with the last 23 bits of the multicast ip to create our Multicat MAC Address :Ġ0000001:00000000:01011110:0 1111111.00000000.00000001 = 01:00:5e:7F:00:01įor Multicast IP Address, the first 4 bits are fixed, these first four bits are 1110. Let’s find the Multicast MAC of this ip address and the other Multicast IP Addresses which use the same MAC address. A locally administered address is assigned to a device by a network administrator, overriding the burned-in address. 3) We will take the fixed part of the Multicast MACs like below and we will write it in binary format.
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