Chapter - Cisco ASR 5000 Series Administration Manual

Link Aggregation Status
Important
Link Aggregation Status
To check the status of link aggregation, use the following commands:
• show port table
• show port info slot/port
A single character is used to display LAG physical port status in the output of the show port table command.
See the table below.
Table 6: LAG Port Status
Display
LA+
LA-
LA~ (tilde)
LA*
LA#
Configuring a Demux Card
You can dedicate a DPC/UDPC or DPC2/UDPC2, or MIO/UMIO/MIO2 to function as a demux card. Demux
is a generic term for signal demultiplexing tasks. These are the tasks are responsible for parsing call setup
(signaling packets) and distributing the calls internally. For this reason there almost as many tasks running
on a demux card as there are services.
The vpnmgr tasks responsible for each context also run on the demux card. The number of vpnmgr tasks
correspond to the number of contexts. A vpnmgr is responsible for IP address assignment to mobile equipment,
IP routing (such as BGP, OSPF), as well as a variety of associated tasks.
Overview
Designating a DPC/UDPC or DPC2/UDPC2, or MIO/UMIO/MIO2 as a demux card frees up resources for
session handling, which has the potential to increase system throughput. However, there is no increased support
in total subscriber capacity due to other system resource restrictions.
ASR 5500 System Administration Guide, StarOS Release 21.4
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Active-Active LAG groups must be configured, along with aggressive microBFD timers (such as 150*3).
During MIO card recovery BGP Sessions might flap based on the configuration. To avoid traffic loss
during these events, BGP graceful restart must be configured with proper hold/keepalive and restart timers.
See the description of the bgp graceful-restart command in the BGP Configuration Mode Commands
chapter of the Command Line Interface Reference.
Description
Port is actively used for distributing (transmit nd recieve data).
Port failed to negotiate LACP.
Port negotiated LACP but another peer was selected.
Port is (re)negotiating LACP.
Port has been gone down because the min-link criteria is not met.
System Settings