VSC7440 datasheet(165/444 Pages) MICROSEMI

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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

148

3.19.3

Statistics

For each frame, ANA_L3 generates a number of events that can be counted in ANA_AC’s statistics

block. Events are generated separately for ingress and egress router legs, and in ANA_AC, event

counting is further split into IPv4 and IPv6.

3.19.3.1 Ingress Router Leg Statistics

The ingress router leg statistics events generated by ANA_L3 are listed in the following table.

For counting of ingress router leg events, eight counter pairs are provided per router leg. Each pair

consists of a counter for IPv4 and a counter for IPv6, for a total of 16 counters that are available per

router leg.

For each of the eight counter pairs, an event mask can be configured to specify which of the Ingress

router leg events listed will trigger the counter. Each counter pair can be configured to count either bytes

or frames.

COMMON:CPU_QU_CFG.CPU_RLEG_IP_HDR_FAIL_QU IPv4 frames with IP header errors.

COMMON:CPU_QU_CFG.CPU_IP_LEN_QU

CPU queue for IPv4/IPv6 frames failing MTU check.

COMMON:CPU_QU_CFG.CPU_MC_FAIL_QU

Failed IP multicast lookup or failed RPF check.

COMMON:CPU_QU_CFG.CPU_UC_FAIL_QU

Failed IPv4/IPv6 unicast LPM lookup, invalid ARP entry

(ARP_ENA=0) or failed ICMP redirect check.

COMMON:CPU_QU_CFG.CPU_IP_TTL_FAIL_QU

Frames with TTL/HL <2.

COMMON:CPU_QU_CFG.CPU_SIP_RPF_QU

Frames failing SIP RPF check.

ARP:ARP_CFG_0.DMAC0_CPU_QU

MAC address in ARP entry is all-zeros.

L3MC:L3MC_CTRL.CPU_QU

L3MC.L3MC_CTRL.CPU_REDIR_ENA = 1.

Table 91 •

Ingress Router Leg Events

Event Name

Description

ivmid_ip_uc_received

IP unicast frame received by router.

ivmid_ip_mc_received

IP multicast frame received by router.

ivmid_ip_uc_routed

IP unicast frame received and L3 forwarded by router.

ivmid_ip_mc_routed

IP multicast frame received and L3 forwarded by router.

ivmid_ip_mc_rpf_discarded

IP multicast frame received by router, but discarded due to MC RPF

check.

ivmid_ip_ttl_discarded

IP multicast frame received by router, but discarded due to TTL <2.

ivmid_ip_acl_discarded

IP frame received by router, but discarded by ACL rules in ANA_AC.

Table 90 •

CPU Queue Overview (continued)

CPU Queue

Description

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