Redundancy Options
For redundancy, there is an option that controls the auto-switching of L2 redundant or active-active ports
when they are connected to two switches. Set this option on the master port for use with the whole group.
link-aggregation redundancy { standard | switched } [hold-time sec] [ preferred slot { card_number |
none } ]
Distribution Option
This option controls how a LAG hash map is generated and is required for Equal Cost Multiple Path (ECMP)
over LAG. Set this option on the master port for use with the whole group.
link-aggregation distribution { simple | rotate | block | random }
The following list defines the distribution options (assuming port index 0,1,2,3 were selected.
•
simple
: Repetition of all selected port indexes (Example: 0123012301230123
…
)
•
rotate
: Repetition of rotated port index (Example: 0123123023013012
…
)
•
block
: Blocks of the same port index (Example: 0000111122223333)
•
random
: Based on pseudo random number
Toggle Link
A port or card switch within the LAG can be set to toggle the link. Enable this option via the
link-aggregation
toggle-link
command at the Card Configuration Mode or Ethernet Port Configuration Mode.
Horizontal Link Aggregation with Two Ethernet Switches
When a LAG contains two sets of ports each connecting to a different Ethernet switch, the operator has the
ability to specify the slot/port (connected to the destination switch) when switching ports.
The Exec mode
link-aggregation port switch to slot/port
command is used to configure this option. The
following criteria apply to the setting of this option:
•
slot/port
must support LAG.
•
slot/port
must be configured with LAG.
•
slot/port
must not be already actively distributing.
•
slot/port
must have negotiated a link aggregation partner in standard mode.
•
slot/port
's partner must have an equal or higher in standard mode.
•
slot/port
's partner bundle must have equal or higher bandwidth in standard mode.
•
Switching to
slot/port
must not violate preference within hold-time in standard mode.
ASR 5000 System Administration Guide, StarOS Release 21.1
78
System Settings
Horizontal Link Aggregation with Two Ethernet Switches
Summary of Contents for ASR 5000
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