Cisco N7K-C7009 Bedienungsanleitung PDF herunterladen (Seite 66)

Presentation_ID

Cisco Public

BRKARC-3470 Cisco Public

10.1.1.2

10.1.1.3

10.10.0.10

10.10.0.100

10.10.0.33

10.1.1.4

10.1.2.xx

10.1.3.xx

10.1.1.xx

10.100.1.xx

10.10.0.xx

10.100.1.xx

10.10.100.xx

IPv4 FIB TCAM Lookup (F2 / F2E)

FIB TCAM

Generate

Lookup Key

10.1.1.10

Generate TCAM lookup key

(destination IP address)

Forwarding Block

FIB DRAM

Load-Sharing

Hash

Adjacency Table

Next-hop 8 (IF, MAC)

Next-hop 10 (IF, MAC)

Next-hop 11 (IF, MAC)

Next-hop 12 (IF, MAC)

Next-hop 9 (IF, MAC)

Next-hop 4 (IF, MAC)

Next-hop 5 (IF, MAC)

Next-hop 6 (IF, MAC)

Next-hop 7 (IF, MAC)

Next-hop 3 (IF, MAC)

Next-hop 1 (IF, MAC)

Next-hop 2 (IF, MAC)

10.1.1.xx

Ingress

unicast IPv4

packet header

Index, # next-hops

Hit in FIB

returns result

in FIB DRAM

Load-sharing

table index

identifies

block to use

Modulo

function

selects

which LS

entry to use

Offset

Compare

lookup

key

Return

lookup

result

# next-

hops

Flow

Data

Result

HIT!

LS Index

mod

Load-Sharing Table

Adj Index

Use of Load-Sharing Table decouples

prefix entries and adjacency entries

Adjacency

entry

contains

next-hop

information

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