Table 87: Layer 3 Host Table
Layer 3 Host Table
Profile IPv6 MulticastIPv6 UnicastIPv4 MulticastIPv4 Unicast
4 KB8 KB8 KB16 KBl2-profile-one
20 KB40 KB40 KB80 KBl2-profile-two
36 KB72 KB72 KB144 KBl2-profile-three (default)
52 KB104 KB104 KB208 KBl3-profile
4 KB8 KB8 KB16 KBlpm-profile
The Layer 3 LPM table is shared between IPv4 route prefixes and IPv6 route prefixes.
Table 88 on page 1170 illustrates the size of the table for different profiles of the IPv4 and
IPv4 addresses in the Layer 3 LPM table. When unicast reverse-path forwarding (unicast
RPF) is enabled, the table size reduces to half.
Table 88: Layer 3 LPM Table
Layer 3 LPM Table
Profile IPv6 Unicast (Prefix > /64)IPv6 Unicast (Prefix <= /64)IPv4 Unicast
4 KB8 KB16 KBl2-profile-one
4 KB8 KB16 KBl2-profile-two
4 KB8 KB16 KBl2-profile-three (default)
4 KB8 KB16 KBl3-profile
8 KB40 KB128 KBlpm-profile
By default, there is no space allocated for IPv6 prefix address longer than /64 in the LPM
table. Therefore, prefix address longer than /64 are not allowed in the table by default.
The entire table is available for IPv4 addresses and for IPv6 addresses that have prefixes
shorter than /64. You can provide space in the table for addresses with prefixes longer
than /64 by using CLI configuration. The number of entries reserved for these prefixes is
configured in multiples of 16.
Configuring the Unified Forwarding Table to Optimize Address Storage Using Profiles
You can use five predefined profiles (l2-profile-one, l2-profile-two, l2-profile-three,
l3-profile, lpm-profile) to allocate the table memory space. The sizes of the Layer 2 MAC
address table, Layer 3 host entry table, and Layer 3 LPM table are decided based on the
selected profile. You can configure and select the profiles that best suits your network
environment needs.
Copyright © 2017, Juniper Networks, Inc.1170
ACX Series Universal Access Router Configuration Guide
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