Reference Guide

Equal Cost Multi-Path | 501
Command
History
Usage
Information
After enabling IPv6 Deterministic ECMP, traffic loss occurs for a few milliseconds while
FTOS sorts the CAM entries.
ipv6 ecmp-deterministic
e
Deterministic ECMP Next Hop arranges all ECMPs in order before writing them into the
CAM. For example, suppose the RTM learns 8 ECMPs in the order that the protocols and
interfaces came up. In this case, the FIB and CAM sort them so that the ECMPs are always
arranged. This implementation ensures that every chassis having the same prefixes orders the
ECMPs the same.
With 8 or less ECMPs, the ordering is lexicographic and deterministic. With more than 8
ECMPs, ordering is deterministic but it is not in lexicographic order.
Syntax
ipv6 ecmp-deterministic
Defaults
Disabled
Command Modes
CONFIGURATION
Command
History
Usage
Information
After enabling IPv6 Deterministic ECMP, traffic loss occurs for a few milliseconds while
FTOS sorts the CAM entries.
ip ecmp-group
Enable and specify the maximum number of ecmp that the L3 CAM hold for a route, By
default, when maximum paths are not configured, the CAM can hold a maximum of 16 ecmp
per route.
Syntax
ip ecmp-group {maximum-paths | {number} {path-fallback}
To negate a command, use the
no command. For example no ip ecmp-group maximum-paths
{
number}
Parameters
Defaults
16
Command Modes
CONFIGURATION
Version 8.3.1.0 Introduced on E-Series.
Version 8.3.1.0 Introduced on E-Series.
maximum-paths
Specify the maximum number of ecmp for a route.
Range: 2 to 64
path-fallback
Use the keyword path-fallback to enable this feature. If the feature is
enabled, re-enter this keyword to disable the feature.