LLXBK | Back to Index page |
Prolog Control Block Contents LLXBK DSECT LLXITEM DSECT Storage Layout Cross Reference (Contains links to field and bit definitions) |
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LLXBK Prolog | Top of page |
NAME : HCPLLXBK DESCRIPTION: Link Layer Index Table entry DSECT : LLXBK FUNCTION : The LLXBK structure represents an array of sessions (NIDBK pointers) registered for a specific Link ID. The Link ID is the MAC address. The LLXBK structure is variable length. LOCATED BY - LANIDTBL - LAN Link ID Table (MLTBK) CREATED BY : Link Layer functions in module HCPLLN. DELETED BY : Link Layer functions in module HCPLLN. RELOCATION CONSIDERATIONS : None LLXID definition - LLXVLAN represents an IEEE VLAN group, or an internally defined code. The following table describes the purpose of each LLXVLAN code: LLXVLAN | Frames which may be delivered --------|------------------------------------------- x'0000' | Untagged (or NULL tagged) frames x'0xxx' | VLAN tagged frames x'0FFF' | Not a valid VLAN group x'1000' | ANY frames (the target is VLAN ANY) x'1xxx' | Routers (for unclaimed frames) LLXMAC represents a MAC address identifying a device (or group of devices) as the destination of a network frame. |
LLXBK Control Block Content | Top of page |
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LLXBK Storage Layout | Top of page |
*** LLXBK - Link Layer Index Table entry * * +-----------------------------------------+-------------+ * 0 | LLXMAC |/////////////| * +-------------+-------------+-------------+-------------+ * 8 | LLXMAX | LLXCOUNT | LLXPTR1 | * +-------------+-------------+---------------------------+ * 10 * *** LLXBK - Link Layer Index Table entry *** Overlay for LLXID in LLXBK * * +-------------+------+------+---------------------------+ * 0 | LLXRXVID |:RXVER|:RXTYP|///////////////////////////| * +-------------+------+------+---------------------------+ * 8 |///////////////////////////| C * +---------------------------+ * *** Overlay for LLXID in LLXBK *** LLXITEM - Link Layer Index Table entry * * +---------------------------+ * 0 | LLXPTR | 4 * +---------------------------+ * *** LLXITEM - Link Layer Index Table entry |
LLXBK Cross Reference | Top of page |
Symbol Dspl Value -------------- ---- ----- LLX_EXP 0000 00000002 LLX_INCR 000A 00000008 LLX_INIT 000A 00000001 LLX_MAX 000A 000003E8 LLXCOUNT 000A LLXHDRLN 000A 0000000C LLXID 0000 LLXLIST 000A 0000000C LLXMAC 0000 LLXMAX 0008 LLXNEXT 0000 00000004 LLXPTR 0000 LLXPTRLN 0000 00000004 LLXPTR1 000C LLXRXID 0000 LLXRXTYP 0003 LLXRXVER 0002 LLXRXVID 0000 |
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