Примечания к выпуску для Cisco Cisco IOS Software Release 12.4(2)XB6
Release Notes for Cisco IOS Release 12.4(24)GC4
Limitations
3
Release Notes for Cisco IOS Release 12.4(24)GC4
OL-24057-03
Limitations
The following limitations exist in this release:
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The QoS policy can only be applied to one outgoing interface the PPPoE session is traversing.
A QoS output policy can be applied to the Virtual Template or the VMI, but not at the same time. If
a policy is attached, the outgoing physical interfaces (ie. physical-interface FastEthernet0/0) should
not have output policy applied. It is recommended that the policy be attached to the Virtual
Template. The other option is to apply the policy to the VMI but not to the Virtual Template or
Ethernet interface.
a policy is attached, the outgoing physical interfaces (ie. physical-interface FastEthernet0/0) should
not have output policy applied. It is recommended that the policy be attached to the Virtual
Template. 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.
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.
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)GC4 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.
12.4(22)GC1 or older. To avoid any issues, ensure that all routers run the same version of Cisco IOS.
Troubleshooting
Use the following command to collect data when reporting router issues:
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show tech
Use the following command to collect data to confirm neighbor establishment:
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show vmi neighbor
Use the following command to display active PPPoE sessions:
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show pppoe session
Use the following command to examine QoS issues:
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show policy-map interface virtual-access interface-number
Use the following commands to debug vmi issues:
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debug vmi error
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debug vmi pppoe
Use the following commands to verify PPPoE and VMI interface operation related to credit information:
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show vmi neighbor detail
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show pppoe session all
Use the following command to debug PPPoE issues:
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debug pppoe error
Use the following command to display OSPFv3 traffic data including LSA counts:
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show ipv6 ospf traffic
Use the following command to display EIGRP traffic data:
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show ip eigrp traffic [as-number]