VSC7440 datasheet(184/444 Pages) MICROSEMI

184 / 444 page

Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

167

If the frame is discarded by the first VCAP IS2 lookup, it is selectable whether to count the frame in the

ingress router leg statistics (ANA_ACL::VCAP_S2_MISC_CTRL.ACL_RT_IGR_RLEG_STAT_MODE).

The frame is never counted by the egress router leg statistics.

If the frame is discarded by the second VCAP IS2 lookup, it is selectable whether to count the frame in

the egress router leg statistics

(ANA_ACL::VCAP_S2_MISC_CTRL.ACL_RT_EGR_RLEG_STAT_MODE). The frame is always

counted by the ingress router leg statistics.

3.21.2

Analyzer Access Control List Frame Rewriting

The ANA_ACL block supports various frame rewrite functions used in routing and PTP.

When rewriting in the ANA_ACL block, ingress mirroring with an exact mirror copy of the incoming frame

is no longer possible, because any rewrites are also reflected in the mirror copy.

3.21.2.1 Address Swapping and Rewriting

VCAP IS2 actions can trigger frame rewrites in the ANA_ACL block with focus on MAC addresses, IP

addresses, TCP/UDP ports as well as IPv4 TTL and IPv6 hop limit.

The following table lists the registers associated with address swapping and rewriting capabilities in

ANA_ACL.

VCAP IS2 action ACL_RT_MODE can enable the following rewrite modes:

•

Replace DMAC. The frame’s DMAC is replaced with the MAC address specified in VCAP IS2 action

ACL_MAC. It is selectable to only replace part of the DMAC (for instance the OUI only). This is

enabled with VCAP IS2 action REW_CMD[9], and the number of bits to replace is set in

ANA_ACL::SWAP_IP_CTRL.DMAC_REPL_OFFSET_VAL.

•

Replace SMAC. The frame’s SMAC is replaced with the MAC address specificed in VCAP IS2

action ACL_MAC.

•

Swap MAC addresses and replace SMAC if MC. The frame’s MAC addresses are swapped. If the

new SMAC is a multicast MAC, it is replaced with the MAC address specificed in VCAP IS2 action

ACL_MAC.

•

Swap MAC addresses if UC else replace SMAC if MC. The frame’s MAC addresses are swapped

if the frame’s DMAC is unicast. Otherwise, the frame’s SMAC is replaced with the MAC address

specificed in VCAP IS2 action ACL_MAC.

•

Swap MAC and IP addresses and replace SIP and SMAC if MC. The frame’s MAC addresses are

swapped and the frame’s IP addresses are swapped. If the new SMAC is a multicast MAC, it is

replaced with the MAC address specificed in VCAP IS2 action ACL_MAC. If the new SIP is a

multicast, it is replaced with an IP address from the IP address table ANA_ACL::SWAP_SIP.

•

Swap MAC and IP addresses if UC else replace SIP and SMAC if MC. The frame’s MAC

addresses are swapped if the frame’s DMAC is unicast. Otherwise, the frame’s SMAC is replaced

with the MAC address specificed in VCAP IS2 action ACL_MAC. The frame’s IP addresses are

swapped if the frame’s DIP is unicast. Otherwise, the frame’s SIP is replaced with an IP address

from the IP address table ANA_ACL::SWAP_SIP.

•

Swap IP addresses and replace SIP if MC. The frame’s IP addresses are swapped. If the new SIP

is a multicast, it is replaced with an IP address from the IP address table ANA_ACL::SWAP_SIP.

•

Replace SMAC, swap IP addresses, and replace SIP if MC. The frame’s SMAC is replaced with

the MAC address specificed in VCAP IS2 action ACL_MAC. The frame’s IP addresses are swapped.

Table 105 •

ANA_ACL Address Swapping and Rewriting Registers

Description

Replication

ANA_ACL::SWAP_SIP

IP table with 32 IPv4 addresses or 8 IPv6 addresses. Provides new

source IP address when swapping IP addresses in frame with

multicast destination IP address.

ANA_ACL::SWAP_IP_CTRL Controls IPv4 TTL and IPv6 hop limit values. Controls number of bits

to replace in DMAC.

None

VSC7440 bảng dữ liệu(PDF) 184 Page - Microsemi Corporation

VSC7440 bảng dữ liệu(HTML) 184 Page - Microsemi Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

bảng dữ liệu tải về

Link URL