Reference Guide
Equal Cost Multi-Path | 521
ip 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
ip 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.
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.
Version 8.3.1.0 Introduced on E-Series.
Version 8.3.1.0 Introduced on E-Series.










