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Community Member

EIGRP Versions. Major/Minor Release

Guys, Can you help.

In the type 5 (hello packet) there is another eigrp release version 1.2 apart from the version 2 in the same header.

This version 1.2 does not appear in any other eigrp packet type, so can I assume this is the revision of the hello protocol for eigrp?

So EIGRP Version 2 hello protocol version 1.2?

Also there is a concept of eigrp Major/Minor releases? What is this and can someone explain.

I am embarking on an EIGRP migration and need to make sure all my EIGRP versions are compatable.

Many thx

Ken

=================================================================

Cisco EIGRP

Version = 2

Opcode = 1 (Update)

Checksum = 0x8b8f

Flags = 0x00000001

Sequence = 6

Acknowledge = 0

Autonomous System : 1

IP internal route = 10.100.1.0/24

Type = 0x0102 (IP internal route)

Size = 28 bytes

Next Hop = 0.0.0.0

Delay = 128000

Bandwidth = 256

MTU = 1514

Hop Count = 0

Reliability = 255

Load = 1

Reserved

Prefix Length = 24

Destination = 10.100.1.0

IP internal route = 10.101.2.0/24

Type = 0x0102 (IP internal route)

Size = 28 bytes

Next Hop = 0.0.0.0

Delay = 128000

Bandwidth = 256

MTU = 1514

Hop Count = 0

Reliability = 255

Load = 1

Reserved

Prefix Length = 24

Destination = 10.101.2.0

=================================================================

Cisco EIGRP

Version = 2

Opcode = 3 (Query)

Checksum = 0xeff6

Flags = 0x00000000

Sequence = 6

Acknowledge = 0

Autonomous System : 200

IP internal route = 10.10.6.0/24 - Destination unreachable

Type = 0x0102 (IP internal route)

Size = 28 bytes

Next Hop = 0.0.0.0

Delay = 4294967295

Bandwidth = 0

MTU = 1514

Hop Count = 0

Reliability = 0

Load = 0

Reserved

Prefix Length = 24

Destination = 10.10.6.0

=================================================================

Cisco EIGRP

Version = 2

Opcode = 4 (Reply)

Checksum = 0xf4eb

Flags = 0x00000000

Sequence = 7

Acknowledge = 6

Autonomous System : 200

IP internal route = 10.10.6.0/24 - Destination unreachable

Type = 0x0102 (IP internal route)

Size = 28 bytes

Next Hop = 0.0.0.0

Delay = 4294967295

Bandwidth = 2560

MTU = 1500

Hop Count = 1

Reliability = 255

Load = 1

Reserved

Prefix Length = 24

Destination = 10.10.6.0

=================================================================

Cisco EIGRP

Version = 2

Opcode = 5 (Hello)

Checksum = 0xeece

Flags = 0x00000000

Sequence = 0

Acknowledge = 0

Autonomous System : 1

EIGRP Parameters

Type = 0x0001 (EIGRP Parameters)

Size = 12 bytes

K1 = 1

K2 = 0

K3 = 1

K4 = 0

K5 = 0

Reserved

Hold Time = 15

Software Version: IOS=12.1, EIGRP=1.2

Type = 0x0004 (Software Version)

Size = 8 bytes

IOS release version = 12.1

EIGRP release version = 1.2

....................................................................

Cisco EIGRP

Version = 2

Opcode = 5 (Acknowledge)

Checksum = 0xfd2c

Flags = 0x00000000

Sequence = 0

Acknowledge = 6

Autonomous System : 200

===================================================================

2 REPLIES
Community Member

Re: EIGRP Versions. Major/Minor Release

Also, it is reported in the output below ?

Router>sh ip eigrp nei det

IP-EIGRP neighbors for process 1

H Address Interface Hold Uptime SRTT RTO Q Seq Type

(sec) (ms) Cnt Num

15 x.x.x.x Fa1/0/0 12 1w3d 28 200 0 29092

Version 12.1/1.2, Retrans: 71, Retries: 0

Many thx all,

Ken

Community Member

Re: EIGRP Versions. Major/Minor Release

Ahh,

I have now understood that this type 5 packet has two TLVs in it. One for EIGRP parameters (0x0001) and one for Software version (0x0004)- "General TLVs" but do not understand the difference between revision two and software version 1.2 and assume that the other eigrp packets dont need general TLVs? Why, I dont know.

Still some help would be great :)

Thx

Ken

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