I G P among Routers

DDSN · Created Jun 20, 2021 03:16:39

Hi umaryaqub，
Do you want to choose which IGP protocol to use?
OSPF and IS-IS have their own advantages and disadvantages, which can be selected based on different application scenarios.
Kindly refer to Differences Between IS-IS and OSPF
https://forum.huawei.com/enterprise/en/differences-between-is-is-and-ospf/thread/484381-863
I hope it helps!

wissal · Created Jun 19, 2021 19:57:29

Hello,

An Autonomous System (AS) is a set of IP networks and routers under one administration entity and with common routing policies.

Each AS supports multiple IGPs. All the networks in an AS are assigned the same AS number and managed by the same administration group. Two types of AS numbers are available: a 2-byte AS number (with a number range from 1 to 65535) and a 4-byte AS number (with a number range from 1 to 4294967295). Available AS numbers can become exhausted thereby 2-byte AS numbers need to be extended to 4-byte AS numbers. A 4-byte AS number is shown in the X.Y format, where X ranges from 1 to 65535 and Y ranges from 0 to 65535.

Based on the network where they are used, AS numbers are classified into two types. Table 1-4 lists the two types of AS numbers and their ranges.

Table 1-4 AS number types and ranges

AS Number Type	2-Byte AS Number	4-Byte AS Number
Public AS number	1 to 64511	1 to 64511, 65536 to 4294967295
Private AS number	64512 to 65535	64512 to 65535

Detail

https://support.huawei.com/enterprise/en/doc/EDOC1100086956

Thanks

DDSN · Created Jun 20, 2021 03:16:39

Hi umaryaqub，
Do you want to choose which IGP protocol to use?
OSPF and IS-IS have their own advantages and disadvantages, which can be selected based on different application scenarios.
Kindly refer to Differences Between IS-IS and OSPF
https://forum.huawei.com/enterprise/en/differences-between-is-is-and-ospf/thread/484381-863
I hope it helps!

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