Compass-EOS Confidential Type ( 10 ) Length (Variable) Authentication type Authentication value Authentication type code Value Reserved 0 Clear text password 1 HNAC-MD5 Authentication 54 Private authentication 255
IS-IS Common Header Compass-EOS Confidential Packet Data … Definition Values network layer identifier assigned to IS-IS (ISO 9577) 0x83 Length of the packet header fields in octets Variable Version 0x1 Indicates length of the source ID (SysID) field 0x0 -> 6 byte IS-IS packet type (3 bits reserved) Hello, LSP or SNP Version 0x1 Reserved 0 Number of area addresses permitted for this intermediate system’s area 0x0 = max 3 areas
Router 2 Gets IIH from 1 and immediately send an IIH back which says “I have seen 1”.
Route 1 receive IIH from route 2, set Adj as up and immediately send an IIH back which says “I have seen 2”.
Router 2 receive second IIH from 1 and set Adj to up
Compass-EOS Confidential Adjacency UP Adjacency UP Router 2 Router 1 IIH Router 1 TLV s IIH Router 1 “ I see Router 2” + TLVs IIH Router 2 “ I see Router 1” + TLVs
IIH – LAN Level 1 and Level 2 Compass-EOS Confidential Field Definition Circuit type Level 1, Level 1-2, or Level 2 only (6 bit reserved) Source ID System ID of the router that generated packet Holding time Maximum interval between two consecutive hello packets before the router is considered no longer available PDU length Length of the entire PDU, including header Priority designates the DIS (Level 1 or Level 2) on the LAN LAN ID SysID of the DIS plus an octet-long unique ID for this router assigned by the DIS. TLV fields Type 1 - Area Addresses Type 6 - IS Neighbors Type 8 - Padding Type 10 - Authentication Type
A router must not originate more than one LSP every 5 seconds
Intradomain Routing Proto Descriminator Lenth Indicator Version/Protocol ID Extension ID Length PDU Type R R R Version Reserved Maximum Area Addresses PDU Length Remaining Lifetime LSP ID Sequence Number Checksum LSPDBOL IS Type P ATT TLVFIELDS