Understanding And Configuring The Unified Forwarding Table; Using The Unified Forwarding Table To Optimize Address Storage - Juniper ACX1000 Configuration Manual

Understanding and Configuring the Unified Forwarding Table

Using the Unified Forwarding Table to Optimize Address Storage

Table 86: Unified Forwarding Table Profiles
Profile
l2-profile-one
l2-profile-two
l2-profile-three (default)
l3-profile
lpm-profile
Copyright © 2017, Juniper Networks, Inc.
Chapter 34: Configuring Operations, Administration, and Management (OAM)
Understanding Ethernet Link Aggregation on ACX Series Routers on page 152
Using the Unified Forwarding Table to Optimize Address Storage on page 1169
Configuring the Unified Forwarding Table to Optimize Address Storage Using
Profiles on page 1170
ACX5048 and ACX5096 routers support the use of a unified forwarding table to optimize
address storage. This feature gives you the flexibility to configure your router to match
the needs of your particular network environment. You can control the allocation of
forwarding table memory available to store the following entries:
MAC addresses
Layer 3 host entries
Longest prefix match (LPM) table entries
You can use five predefined profiles (
l3-profile, lpm-profile ) to allocate the table memory space differently for each of these
entries. 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.
Table 86 on page 1169 illustrates the predefined profiles in the unified forwarding table
and the respective table sizes.
Layer 2 MAC Address Table
288 KB
224 KB
160 KB
96 KB
32 KB
IPv4 unicast, IPv6 unicast, IPv4 multicast, and IPv6 multicast route addresses share the
Layer 3 host entry table. If the host table stores the maximum number of entries for any
given type, the entire table is full and is unable to accommodate any entries of any other
type. The IPv4 multicast and IPv6 unicast addresses occupy double the space as that
occupied by IPv4 unicast entries, and IPv6 multicast addresses occupy four times the
space of the IPv4 unicast addresses.
size for each profile.
l2-profile-one, l2-profile-two, l2-profile-three,
Layer 3 Host Table
16 KB
80 KB
144 KB
208 KB
16 KB
Table 87 on page 1170 shows the Layer 3 host table
Layer 3 LPM Table
16 KB
16 KB
16 KB
16 KB
128 KB
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