Two Port 10/100 Managed Ethernet Switch with
Datasheet
14.5.3.40Switch Engine Interrupt Pending Register (SWE_IPR)Register #: | 1881h | Size: | 32 bits |
This register contains the Switch Engine interrupt status. The status is double buffered. All interrupts in this register may be masked via the Switch Engine Interrupt Mask Register (SWE_IMR) register. Refer to Chapter 5, "System Interrupts," on page 49 for more information.
BITS | DESCRIPTION | TYPE | DEFAULT |
31:15 | RESERVED |
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14:11 | Drop Reason B | RC | 0h | |||
| When bit 8 is set, these bits indicate the reason a packet was dropped per |
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| BIT |
| DESCRIPTION |
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| VALUES |
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| 0000 |
| Admit Only VLAN was set and the packet was untagged or priority tagged. |
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| 0001 |
| The destination address was not in the ALR table (unknown or broadcast), |
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| Enable Membership Checking on ingress was set, Admit Non Member was |
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| cleared and the source port was not a member of the incoming VLAN. |
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| 0010 |
| The destination address was found in the ALR table but the source port was |
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| not in the forwarding state. |
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| 0011 |
| The destination address was found in the ALR table but the destination port |
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| was not in the forwarding state. |
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| 0100 |
| The destination address was found in the ALR table but Enable Membership |
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| Checking on ingress was set and the destination port was not a member of the |
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| incoming VLAN. |
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| 0101 |
| The destination address was found in the ALR table but the Enable |
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| Membership Checking on ingress was set, Admit Non Member was cleared and |
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| the source port was not a member of the incoming VLAN. |
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| 0110 |
| Drop Unknown was set and the destination address was a unicast but not in |
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| the ALR table. |
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| 0111 |
| Filter Multicast was set and the destination address was a multicast and not in |
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| the ALR table. |
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| 1000 |
| The packet was a broadcast but exceeded the Broadcast Throttling limit. |
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| 1001 |
| The destination address was not in the ALR table (unknown or broadcast) and |
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| the source port was not in the forwarding state. |
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| 1010 |
| The destination address was found in the ALR table but the source and |
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| destination ports were the same. |
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| 1011 |
| The destination address was found in the ALR table and the Filter bit was set |
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| for that address. |
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| 1100 |
| RESERVED |
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| 1101 |
| RESERVED |
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| 1110 |
| A packet was received with a VLAN ID of FFFh |
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| 1111 |
| RESERVED |
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SMSC LAN9311/LAN9311i | 411 | Revision 1.4 |
| DATASHEET |
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