Cisco Cisco IOS Software Release 12.4(20)YA 發佈版本通知

c2801-advipservicesk9-mz.bin 

c3250-adventerprisek9-mz.bin 

c3270-adventerprisek9-mz.bin 

c3825-adventerprisek9-mz.bin 

c3825-advipservicesk9-mz.bin 

c3845-adventerprisek9-mz.bin 

c3845-advipservicesk9-mz.bin

You must have a Cisco.com account to download the software. 

The following documentation is available for use:

(

OL-19437-02)

The following features have been added to this release:

Support for QoS (MQC) 

The following limitations exist in this release:

The QoS policy can only be applied to one outgoing interface the PPPoE session is traversing. Input 
policies are not supported.

QoS Policy should be applied to Virtual Template and not Virtual Multipoint Interface or Ethernet 
interfaces. The other option is to apply the policy to the VMI but not to the Virtual Template or 
Ethernet interface.

When a service policy is applied to the VMI and packets are dropped on the VA due to credit 
starvation, the show policy-map int VMI command will not show these dropped packets. There is 
no backpressure between the interfaces in this configuration. The VMI does not know that packets 
were dropped by the VA or the Ethernet physical interfaces.

RFC 5578 credits do not tie into QoS formulas. Credits only indicate to QoS the ability to transmit 
a packet or not. If there are enough credits a packet will be transmitted from the highest priority 
queue. When there are not enough credits, packets will be queued.

Software Release 12.4(24)GC2 may have OSPFv3 incompatibility issues with software versions 
12.4(22)GC1 or older. To avoid any issues, ensure that all routers run the same version of Cisco IOS.

Use the following command to collect data when reporting router issues:

Use the following command to collect data to confirm neighbor establishment: