环境：

76做汇聚层交换机。

问题：

客户在2口上开启3层功能，应用单臂路由来提供vlan间的路由。当配置到封装类型时报错：

C7609-2(config-subif)#interface GigabitEthernet1/1.1
C7609-2(config-subif)# encapsulation dot1Q 11
Command rejected: VLAN 11 cannot be allocated. VLANs 1-1005 are VTP VLANs
VTP mode is client or server and must be changed to Transparent to use VLANs 1-1005
C7609-2(config-subif)# ip address 10.171.0.93 255.255.255.252

% Configuring IP routing on a LAN subinterface is only allowed if that
subinterface is already configured as part of an IEEE 802.10, IEEE 802.1Q,
or ISL vLAN.

解决问题：

在交换机上，在2层端口上启用3层功能是受限制的，根据版本及硬件不同，限制也有所差别。现在拿65和76举例。
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环境：

7609做接入层交换机，下联DSLAM，上联核心，其余的是2层应用。

问题：

Console 有log告警，并且只出现几次，分别是module8 和module9，具体告警如下所示：

%PM-SP-STDBY-4-LIMITS: The number of vlan-port instances on module 8 exceeded the recommended limit of 1800
%PM-SP-4-LIMITS: The number of vlan-port instances on module 8 exceeded the recommended limit of 1800
%PM-SP-STDBY-4-LIMITS: The number of vlan-port instances on module 9 exceeded the recommended limit of 1800
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环境：

5台3750堆叠。

—————— show switch detail ——————

Switch/Stack Mac Address : 001d.a224.0400
H/W Current
Switch# Role Mac Address Priority Version State
———————————————————-
*1 Master 001d.a224.0400 14 0 Ready
2 Member 001d.a23c.ff80 12 0 Ready
3 Member 001d.e516.f880 10 0 Ready
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1、3750与7206之间为三层OSPF互联
2、29、37之间连接全为两层trunk
3、29-1到29-5都属于vlan2，并且block口在29之间
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