今天在学校的一个三层交换上看到持续的日志信息: Host 00:E0:FC:09:BC:F9is flapping between fa0/x and fa0/y. 思科对此官方的解释是: Error Message SW_MATM-4-MACFLAP_NOTIF: Host [enet] in [chars] [dec] is flapping between port [chars] and port [chars] 某主机的MAC地址在某两端口之间摆动. Explanation This
导致交换机端口呈现err-disable状态的原因有很多,为方便大家查询,特归纳如下: 1. duplex mismatch (A is correct) 2. port-channel misconfiguration 3. Bridge Protocol Data Unit (BPDU) Guard violation 4. UniDirectional Link Detection (UDLD) condition (B is correct) 5. late-collision de
故障描述 经用户反馈,一台cisco2960x接入交换机的一个端口插网线不通,ip电话也没有poe供电. 排查过程 查看交换机端口状态,发现变成了errdisable: ZH_HQN_SW2960X_04#show int g1/0/14GigabitEthernet1/0/14 is down, line protocol is down (err-disabled) 从官方文档找到恢复的方法: errdisable recovery cause all 接下来就可以查看errdisable的
一.对于S21的进入(上行)的数据的限速,可以用Qos做到. ip access-list extended acl_1 配置ACLpermit ip 172.16.41.0 0.0.0.255 any 进入端口源地址为172.16.41.0的数据流 deny ip any any!class-map class_1 设置分类映射图match access-group acl_1
实验设备: 二层交换机一台,主机三台 实验步骤: 1.进入相应的接口 (以端口1设置Mac地址绑定,PC0接1端口举例) Switch>enable Switch#config Configuring from terminal, memory, or network [terminal]? Enter configuration commands, one per line. End with CNTL/Z. Switch(config)#Switch(config)#interface fa
先给端口设vlan,再给vlan设ip [H3C]vlan [H3C-vlan100]port GigabitEthernet // <H3C>sy System View: return to User View with Ctrl+Z. [H3C] [H3C-Vlan-interface100]ip address 192.168.0.30 255.255.255.0 [H3C-Vlan-interface100]
1.接入交换机: interface Ten-GigabitEthernet1/0/21 port link-mode bridge port link-type trunk port trunk permit vlan all port link-aggregation group 100 interface Ten-GigabitEthernet1/0/22 port link-mode bridge port link-type trunk port trunk permit vlan