Configuring Equal-Cost Multipath Load Sharing; Hashed Mode; Defining Maximum Paths - Juniper IGP - CONFIGURATION GUIDE V11.1.X Configuration Manual

JUNOSe 11.0.x IP, IPv6, and IGP Configuration Guide
tcp resequence-buffers default-connection-maximum

Configuring Equal-Cost Multipath Load Sharing

Equal-cost multipath (ECMP) sets are formed when the router finds routing table
entries for the same destination with equal cost. The router then balances traffic
across these sets of equal-cost paths by using hashed mode.

Hashed Mode

Hashed mode uses hashing of source and destination addresses to determine which
of the available paths in the ECMP set to use. Hashed mode is the default ECMP mode
of operation.

Defining Maximum Paths

You can add routing table entries manually (as static routes), or they are formed as
routers discover their neighbors and exchange routing tables (via OSPF, BGP, and
other routing protocols).
The maximum paths command controls the maximum number of parallel routes
that the routing protocol (BGP, IS-IS, OSPF, or RIP) can support.
maximum-paths
150
Configuring Equal-Cost Multipath Load Sharing
10 buffers.
See tcp resequence-buffers connection-maximum
Use to specify the default buffer limit assigned to all TCP connections on a virtual
router unless a specific limit is set for the VR in which the connection is
established.
Specify a value of zero (0) buffers to turn off the default limit.
Example
host1(config)#tcp resequence-buffers default-connection-maximum 100
Use the no version to revert the connection maximum value to its default, 10
buffers.
See tcp resequence-buffers default-connection-maximum
Use to control the maximum number of parallel routes that the routing protocol
supports.
The maximum number of routes can be in the range 1–16 for BGP, IS-IS, OSPF,
or RIP.
Example
host1(config-router)#maximum-paths 2