IS-IS Network Design Solutions (Networking Technology)

Example A-1 Analyzer Capture: LAN Level-1 Hello Packet

ADDR HEX ASCII 0000: 01 80 c2 00 00 14 00 d0 58 f7 89 41 05 dc fe fe .....DX A.ww 0010: 03 83 1b 01 00 0f 01 00 00 03 00 00 00 00 00 01 . .............. 0020: 00 0a 05 d9 40 00 00 00 00 00 01 01 81 01 cc 01 ...@.......... 0030: 04 03 49 00 01 84 04 0a 01 01 01 06 0c 00 d0 58 ..I.."........DX 0040: eb f8 41 00 d0 58 eb ff 01 08 ff 00 00 00 00 00 A.DX....... 0050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 0060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 0070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 0090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 0100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 0110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 0120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 0130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 0140: 00 00 00 00 00 00 00 00 00 00

Example A-2 Decode of Example A-1 (Part 1)

DLC: ----- DLC Header ----- DLC: DLC: Frame 1 arrived at 19:03:01.2025; frame size is 1514 (05EA hex) bytes. DLC: Destination = Multicast 0180C2000014 DLC: Source = Station 00D058F78941 DLC: 802.3 length = 1500 DLC: LLC: ----- LLC Header ----- LLC: LLC: DSAP Address = FE, DSAP IG Bit = 00 (Individual Address) LLC: SSAP Address = FE, SSAP CR Bit = 00 (Command) LLC: Unnumbered frame: UI

Example A-3 Decode of Example A-1 (Part 2)

IS-IS: ----- ISO Network Layer Header ----- IS-IS: IS-IS: Protocol ID = 83 (Intermediate System Routing Exchange Protocol) IS-IS: Header length = 27 IS-IS: Version / Protocol ID Extension = 1 IS-IS: ID Length = 0, Indicates 6 Octets IS-IS: PDU type = 15 (Hello, LAN Level 1) IS-IS: Version = 1 IS-IS: Reserved = 0 IS-IS: Maximum Area Addesses = 0 IS-IS: Circuit Type = 3 (Both level 1 and level 2 routing) IS-IS: Source ID = 000000000001 IS-IS: Holding time is 10 second(s) IS-IS: Frame length is 1497 byte(s) IS-IS: Designated Intermediate System for Level 1 IS-IS: Priority = 64 IS-IS: Address = 000000000001 IS-IS: ID = 01

Example A-4 Decode of Example A-1 (Part 3)

IS-IS: ----- ISO Network Layer Variable Fields ----- IS-IS: IS-IS: Variable field: IS-IS: Field Code = 129 (Protocols Supported) IS-IS: Field length = 1 IS-IS: NLPID'sfor protocols within this IS: IS-IS: NLPID = CC (Internet IP) IS-IS: Variable field: IS-IS: Field Code = 1 (Manual Area Addresses) IS-IS: Field length = 4 IS-IS: Manual Area Address: IS-IS: Length = 3 IS-IS: Format = 49 (Local Binary) IS-IS: Address = 490001 IS-IS: Variable field: IS-IS: Field Code = 132 (IP Interface Address) IS-IS: Field length = 4 IS-IS: IP Interface Address: IS-IS: IP Address = [10.1.1.1] IS-IS: Variable field: IS-IS: Field Code = 6 (System Neighbors) IS-IS: Field length = 12 IS-IS: Neighbor = 00D058EBF841 IS-IS: Neighbor = 00D058EBFF01 IS-IS: Variable field: IS-IS: Field Code = 8 (Padding) IS-IS: Field length = 255

Example A-5 Analyzer Capture: LAN Level-2 Hello Packet

ADDR HEX ASCII 0000: 01 80 c2 00 00 15 00 d0 58 f7 89 41 05 dc fe fe ....DX A.ww 0010: 03 83 1b 01 00 10 01 00 00 03 00 00 00 00 00 01 . .............. 0020: 00 0a 05 d9 40 00 00 00 00 00 01 01 81 01 cc 01 ...@.......?.. 0030: 04 03 49 00 01 84 04 0a 01 01 01 06 06 00 d0 58 ..I.."........DX 0040: eb f8 41

Example A-6 Decode of Example A-5 (LAN Level-2 Hello Packet)

IS-IS: -----ISO Network Layer Header ----- IS-IS: IS-IS: Protocol ID = 83 (Intermediate System Routing Exchange Protocol) IS-IS: Header length = 27 IS-IS: Version / Protocol ID Extension = 1 IS-IS: ID Length = 0, Indicates 6 Octets IS-IS: PDU type = 16 (Hello, LAN Level 2) IS-IS: Version = 1 IS-IS: Reserved = 0 IS-IS: Maximum Area Addesses = 0 IS-IS: Circuit Type = 3 (Both level 1 and level 2 routing) IS-IS: Source ID = 000000000001 IS-IS: Holding time is 10 second(s) IS-IS: Frame length is 1497 byte(s) IS-IS: Designated Intermediate System for Level 2 IS-IS: Priority = 64 IS-IS: Address = 000000000001 IS-IS: ID = 01