Aggregates ports on ASR 5500 Management Input/Output (MIO) cards, and sets related parameters in accordance with IEEE 802.3ad.
Product
WiMAX
PDSN
HA
FA
GGSN
SGSN
Privilege
Security
Administrator, Administrator
Mode
Exec > Global
Configuration > Ethernet Port Configuration
configure > port ethernet
slot_number/port_number
Entering the above
command sequence results in the following prompt:
[local]host_name(config-port-slot_number/port_number)#
Syntax
link-aggregation { distribution { block | random | rotate | simple } | lacp { active | passive } [ rate { auto | fast | slow } ] [ timeout { long | short } ] | master { global group group_number | group group_number | local group group_number } | member { global group group_number | group group_number | local group group_number [ min-link number_links mode { non-redundant | redundant } ] } | redundancy { standard | switched } [ hold-time sec ] [ preferred slot { card_number | none } ] | toggle-link }
no link-aggregation [ toggle-link ]
default link-aggregation { distribution | lacp | redundancy | toggle-link }
distribution { block | random | rotate | simple
}
Important |
The
distribution
keyword is
not
supported on the ASR 5500.
|
Configures link aggregation distribution and controls how a Link Aggregation Group (LAG) hash map is generated. This method
is required for Equal Cost Multi-Path (ECMP) routing over LAG. Set this option on the master port for use with the whole group.
The following list defines the distribution options (assuming port index 0,1,2,3 were selected):
block : Blocks of the same port index (Example:
0000111122223333)
random : Based on pseudo random number
rotate : Repetition of rotated port index (Example:
0123123023013012...)
simple : Repetition of all selected port indexes
(Example: 0123012301230123...)
lacp { active | passive }
Configures the Link
Aggregation Control Protocol (LACP). Set this option on the master port for use
with the whole group.
active mode sends out LACP packets periodically. This is the default setting.
passive mode only responds to LACP packets
received.
rate { auto | fast | slow }
Configures the rate
at which the LACP sends packets.
auto : rate is controlled by the peer
fast : 1 second
slow : 30 seconds (Default) [ASR 5000 only]
timeout { long | short }
Configures LACP
timeout events. Set this option on the master port for use with the whole
group.
long : Set LACP to long timeout (30 seconds)
short : Set LACP to short timeout (3 seconds)
master { global group
group_number | group
group_number | local group
group_number }
This command
creates the Master port for the aggregated group.
global : Set group global across slots.
group group_number : Set link aggregation group number. The group_number must be an integer from 1 through 1023.
local : Set group local within same slot.
member { global group
group_number | group
group_number | local group
group_number }
This command makes
the port a member of the aggregated group.
global : Set group global across slots.
group group_number : Set link aggregation group number. The group_number must be an integer from 1 through 1023.
local : Set group local within same slot.
min-link
number_links
Important |
This feature is
only supported on the ASR 5500.
|
Specifies that a
Link Aggregation Group (LAG) is up /usable only when a minimum number of links
are available for aggregation. This guarantees that a minimum amount of
bandwidth is available for use.
The number_links specifies the minimum number of links required to avoid a LAG switchover. It is an integer from 1 through 255.
When this feature
is enabled, a LAG is not usable when the number of links in a LAG goes below
the configured min-link value. Switchover to another LAG bundle (if available)
automatically occurs when the number of links in the current active bundle goes
below the configured min-link value.
mode { non-redundant |
redundant }
Important |
This feature is
only supported on the ASR 5500.
|
Specifies whether
the LAG is configured in
non-redundant
(Active-Active mode) or
redundant
(Active-Standby) mode.
redundancy { standard | switched } [ hold-time
sec ] [ preferred slot {
card_number | none } ]
Connects ASR 5500 MIOs to different Ethernet switches. The master port must be set to make this effective for the group.
standard : Treats all cards in the group as one
group. (Default)
switched : Assumes cards are connected to different switches. [ASR 5000 only]
hold-time sec : Sets the amount of time to hold (in seconds) before switching between cards. Applies to standard and switched modes.The
sec must be an integer from 0 through 3600. Default: 10
preferred slot {
card_number
| none } : Specifies the preferred behavior for a LAG using two Ethernet switches. Applies to standard and switched modes. The card_number is an integer with value 5 or 6 on an ASR 5500.
When a card number is specified, system behavior varies based on the card type. For MIO (ASR 5500) card, the preferred slot
is selected for the initial timeout period to make the selection of an Ethernet switch less random.
none : Specifies no preferred slot.
toggle-link
Important |
The
toggle-link
keyword is
not
supported on the ASR 5500.
|
Set to toggle link
on port switch.
default
Restores the
default values.
no
This command
deletes the Ethernet port from any group it might be in. If the port was the
Master of a group, the whole group would be deleted.
Usage Guidelines
Configure from one to four ports on a QGLC (vertical aggregation) or the single port on XGLCs (horizontal aggregation), or
traffic ports on an MIO card to be in an aggregation group that links to an aggregation group on a remote Ethernet switch.
Very large files can be downloaded across all ports in a group, which makes for a faster download when compared to serial
downloads over a single link.
Related link-aggregation commands are described in the Card Configuration Mode Commands and Global Configuration Mode Commands chapters of this guide. For additional information, also refer to the System Administration Guide.
Example
The following
example configures the port to be part of Master Group
2:
link aggregation master group 2