Intel IXP400 manual Management Information, Ixosalmbuf Port ID Field Values, Field Bit Values

Intel® IXP400 Software

Access-Layer Components: Ethernet Access (IxEthAcc) API

Table 21. IX_OSAL_MBUF “Port ID” Field Values

Field	Bit		Values
	Position
		Ethernet-capable NPE identifier, defined as follows:
		0x0	- NPE A (on Intel® IXP46X product line processors only)
NPE ID	5.4	0x1	- NPE B
		0x2	- NPE C
		0x3	- Reserved
		Sequential MII port number within the range of supported MII ports for
		the specified NPE. The valid ranges are as follows:
		IXP42X product line processors
		•	NPE A - none
PORT ID	3..0	•	NPE B - 0x0
		•	NPE C - 0x0
		Intel® IXP46X product line processors
		•	NPE A - 0x0
		•	NPE B - 0x0-0x3
		•	NPE C - 0x0

Table 22. ixp_ne_flags.link_prot Field Values

Value	EthRx Frame Type	EthTx Frame Type
00	IEEE802.3 - 8802 (with LLC/SNAP)	IEEE802.3 - 8802 (with LLC/SNAP)
01	IEEE802.3 - Ethernet (w/o LLC/SNAP)	IEEE802.3 - Ethernet (w/o LLC/SNAP)
10	IEEE802.11 - AP -> STA	IEEE802.11 - STA -> AP
11	IEEE802.11 - AP -> AP	IEEE802.11 - AP -> AP

9.9Management Information

The IxEthAcc component provides MIB II EtherObj statistics for each interface. The statistics are collected from Ethernet component counters and NPE collected statistics. Statistics are gathered for collisions, frame alignment errors, FCS errors, etc.

Note that each frame may be counted against a maximum of one statistic counter. In the case when more than one statistic may apply to a particular frame, it is the condition that causes the frame to be dropped at the earliest point in the data path that is recorded.

MII/RMII errors (for example, MII/RMII alignment errors, extra byte errors) take precedence over MAC errors (FCS errors, late collisions, etc.). Next in precedence are buffer overrun errors, which take precedence over frame drops due to filtering operations. The filtering operations occur in the order of destination MAC address filtering, spanning tree, VLAN acceptable frame type filtering, VLAN ID-based filtering, firewall, and then internal queue under-run errors.

The statistics counters that are support by the Ethernet access component are shown in Table 23 and Table 24. For more details on these statistics objects, see RFC 2665.

These APIs are provided to retrieve these statistics:

April 2005	IXP400 Software Version 2.0	Programmer’s Guide
152	Document Number: 252539, Revision: 007