发布时间: 2018-07-02 | 浏览次数: 519 | 下载次数: 0 | 作者: lWX568935 | 文档编号: EKB1001718231
用户因业务访问需求,需进行链路聚合操作,使用2台S6720进行E-Trunk对接,第1个E-Trunk捆绑8条链路,业务可正常访问,第2个E-Trunk捆绑4条链路,端口状态正常,直连业务不通,MAC地址无法学习到。
关键配置信息如下:
S6720-A:
interface Eth-Trunk1
description to_2-3_S6720
port link-type trunk
port trunk allow-pass vlan 2 to 99 101 103 to 4094
#
interface Eth-Trunk2
port link-type trunk
port trunk allow-pass vlan 100 102
interface XGigabitEthernet0/0/1
eth-trunk 1
#
interface XGigabitEthernet0/0/2
eth-trunk 1
#
interface XGigabitEthernet0/0/3
eth-trunk 1
#
interface XGigabitEthernet0/0/4
eth-trunk 1
#
interface XGigabitEthernet0/0/5
eth-trunk 1
#
interface XGigabitEthernet0/0/6
eth-trunk 1
#
interface XGigabitEthernet0/0/7
eth-trunk 1
#
interface XGigabitEthernet0/0/8
eth-trunk 1
interface XGigabitEthernet0/0/19
eth-trunk 2
#
interface XGigabitEthernet0/0/20
eth-trunk 2
#
interface XGigabitEthernet0/0/21
eth-trunk 2
#
interface XGigabitEthernet0/0/22
eth-trunk 2
S6720-B:
interface Eth-Trunk1
description to_LT_S6720
port link-type trunk
port trunk allow-pass vlan 2 to 99 101 103 to 4094
#
interface Eth-Trunk2
port link-type trunk
port trunk allow-pass vlan 100 102
#
interface Eth-Trunk4
description to_RZ6851-40GE-1&2
port link-type trunk
port trunk allow-pass vlan 2 to 4094
#
interface XGigabitEthernet0/0/1
eth-trunk 1
#
interface XGigabitEthernet0/0/2
eth-trunk 1
#
interface XGigabitEthernet0/0/3
eth-trunk 1
#
interface XGigabitEthernet0/0/4
eth-trunk 1
#
interface XGigabitEthernet0/0/5
eth-trunk 1
#
interface XGigabitEthernet0/0/6
eth-trunk 1
#
interface XGigabitEthernet0/0/7
eth-trunk 1
#
interface XGigabitEthernet0/0/8
eth-trunk 1
#
interface XGigabitEthernet0/0/9
eth-trunk 2
#
interface XGigabitEthernet0/0/10
eth-trunk 2
#
interface XGigabitEthernet0/0/11
eth-trunk 2
#
interface XGigabitEthernet0/0/12
eth-trunk 2
通过查看E-Trunk信息,发现E-Trunk1及E-Trunk2端口状态均正常,无配置异常之处。E-Trunk信息如下:
通过与用户沟通得知,用户两台设备间使用2个E-Trunk进行对接,虽然通过透传不同的VLAN来避免产生环路,表面上没有形成环路,但默认情况下,E-Trunk中并没有禁用vlan 1通过,导致vlan 1默认在E-Trunk中放行,从而触发STP生效,阻断E-Trunk链路。
在E-Trunk2下将stp功能禁用,问题解决,E-Trunk2业务可正常访问。
在进行E-Trunk对接时,如果可以确认网络中无环路存在,可以手工在E-Trunk中禁用STP功能,防止STP对E-Trunk链路产生影响。