show forwarding configuration
show forwarding configuration
Description
Displays the configured selection criteria for ECMP routes and load-sharing group ports and the hardware table
settings, including the configured and current hash algorithm and dual-hash
settings.
Syntax Description
This
command has no arguments or variables.
Usage Guidelines
The output of this command displays the following information:
- Configured hash algorithm—The hash algorithm configured
on the switch. After the configuration is saved and the switch is rebooted,
the switch uses this hash algorithm.
- Current hash algorithm—The hash algorithm currently used
by the switch.
- Configured dual-hash setting—Whether the dual-hash
feature is configured ‘on‘ or ‘off‘ on the switch. After the configuration
is saved and the switch is rebooted, the switch uses this setting.
- Current dual-hash setting—Whether the dual-hash feature
is currently ‘on‘ or ‘off‘ on the switch.
- Dual-Hash recursion level—The current dual-hash
recursion level; default is ‘1.‘
- Sharing criteria—Current selection criterion used for
ECMP route sharing as well as for load-sharing groups. Specifies which Layer
3 and Layer4 information is used in the sharing hash algorithm. For more
information, see the description for the configure forwarding sharing
[L3 | L3_L4] command.
- Group Table Compression—Whether the group table
compression is currently ‘on‘ or ‘off‘ on the switch.
- Switching mode—Whether the switching mode is currently
set to ‘cut-through‘ or ‘store-and-forward.‘
- Fabric flow control—Whether flow control fabric
configuration is set to ‘auto‘ or ‘off.‘
- ARP and ND Settings:—Suppression filter status.
- Extended Edge
Switching—VLAN port membership and IP
multicast replication status.
It is possible for the values of the configured and the current hash, or the
configured and current dual-hash settings to be different. For example, if you
modified the hash algorithm and have not saved the configuration and rebooted the
switch, the values might be different. In this situation, the switch also displays
the following message:
NOTE: A save and reboot are required before the configured hash will take effect
Example
The following command displays the hardware forwarding algorithm
configured on the switch:
show forwarding configuration
L2 and L3 Forwarding table hash algorithm:
Configured hash algorithm: crc32
Current hash algorithm: crc32
L3 Dual-Hash configuration:
Configured setting: on
Current setting: on
Dual-Hash Recursion Level: 1
Hash criteria for IP unicast traffic for L2 load sharing and ECMP route sharing
Sharing criteria: L3_L4
IP multicast:
Group Table Compression: on
Local Network Forwarding: slow-path
Lookup-Key: (SourceIP, GroupIP, VlanId)
Internal lookup tables:
Configured Setting: l2-and-l3
Current Setting: l2-and-l3
Switch Settings:
Switching mode: store-and-forward
L2 Protocol:
Fast convergence: on
Rate Limit:
Overhead Bytes: 20
Fabric Flow Control:
Fabric Flow Control: auto
ARP and ND Settings:
ARP Suppression Filters: per-port
ND Suppression Filters: per-port
VPEX Settings:
VLAN Port Membership: hash-table
IPMC Replication: bpe
History
This command was
first available in ExtremeXOS 11.3.2.
The flow control feature
was added in ExtremeXOS 12.5.
The Forwarding Lookup-Key feaure show output is added in ExtremeXOS 15.3.
Extended Edge
Switching setting for VLAN port membership was added in ExtremeXOS 22.6.
Extended Edge
Switching IP multicast replication feature
information was added in ExtremeXOS 30.6.
Platform Availability
This command is available on ExtremeSwitching X435,
X440-G2, X450-G2, X460-G2, X465, X590, X620, and X695 series switches.