客户现场有两台S7506E做了IRF,采用BFD MAD方式来监测IRF的状态。在做IRF分裂测试时,IRF物理端口手工shutdown后,发现备设备连接接入交换机的物理接口未被mad shutdown,上连的三层物理端口以及vlan-interface都已被mad shutdown。
===============display interface brief===============
BAGG31 UP 1G(a) F(a) T 1
BAGG32 UP 1G(a) F(a) T 1
BAGG33 UP 1G(a) F(a) T 1
BAGG35 UP 1G(a) F(a) T 1
GE2/2/0/24 UP 1G(a) F(a) A 3
GE2/4/0/1 UP 1G(a) F(a) T 1
GE2/4/0/2 UP 1G(a) F(a) T 1
GE2/4/0/3 UP 1G(a) F(a) T 1
GE2/4/0/13 UP 1G(a) F(a) T 1
1、检查BFD MAD的相关配置,无异常:
#
vlan 3
#
interface Vlan-interface3
mad bfd enable
mad ip address 192.168.2.1 255.255.255.0 member 1
mad ip address 192.168.2.2 255.255.255.0 member 2
#
interface GigabitEthernet1/2/0/24
port link-mode bridge
port access vlan 3
undo stp enable
#
interface GigabitEthernet2/2/0/24
port link-mode bridge
port access vlan 3
undo stp enable
#
2、在设备上display vlan 3发现,未被mad shutdown的端口都放通了vlan 3:
vlan 3:
VLAN ID: 3
VLAN type: Static
Route interface: Configured
IPv4 address: 192.168.2.2
IPv4 subnet mask: 255.255.255.0
Description: VLAN 0003
Name: VLAN 0003
Tagged ports:
Bridge-Aggregation31 Bridge-Aggregation32
Bridge-Aggregation33 Bridge-Aggregation35
GigabitEthernet2/4/0/1 GigabitEthernet2/4/0/2
GigabitEthernet2/4/0/3 GigabitEthernet2/4/0/13
Untagged ports:
GigabitEthernet2/2/0/24
3、查看相关接口配置发现,接口都是trunk模式,并且允许vlan 3通过:
interface GigabitEthernet2/4/0/1
port link-mode bridge
port link-type trunk
port trunk permit vlan 1 to 900
port link-aggregation group 31
当物理接口允许BFD MAD检测专用vlan通过后,接口会被当做BFD MAD检测接口。IRF分裂时,IRF物理端口、BFD MAD检测接口以及用户配置的保留聚合接口的成员接口自动作为系统保留接口,不会被关闭。
1、在连接接入交换机的物理口上undo port trunk permit vlan 3,IRF分裂后备设备的相关接口正常被mad shutdown。
2、用作BFD MAD检测的vlan是专用的,不要把正常的业务端口加入到这个vlan内。
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