不涉及
现场S6800交换机对接Cisco的6603交换机,两端使用BFD检测静态路由,完成BFD的配置之后,发现我司设备BFD状态为init,Cisco侧BFD状态为down,无法正常进行检测
1、检查配置问题
我司配置如下,没有什么问题
bfd multi-hop min-transmit-interval 500
interface Route-Aggregation1.5
description PL-FW1
ip address 10.93.123.9 255.255.255.248
bfd min-transmit-interval 500
bfd min-receive-interval 500
ip route-static 10.150.0.0 16 10.93.123.10 bfd control-packet bfd-source 10.93.123.9
2、检查BFD状态
display bfd session verbose
Total Session Num: 1 Up Session Num: 0 Init Mode: Active
IPv4 Session Working Under Ctrl Mode:
Local Discr: 97 Remote Discr: 1
Source IP: 10.93.123.9 Destination IP: 10.93.123.10
Session State: Init Interface: Vlan-interface5
Min Tx Inter: 500ms Act Tx Inter: 1000ms
Min Rx Inter: 500ms Detect Inter: 5000ms
Rx Count: 16 Tx Count: 94
Connect Type: Direct Running Up for: 00:00:00
Hold Time: 2300ms Auth mode: None
Detect Mode: Async Slot: 1
Protocol: STATIC
Diag Info: No Diagnostic
我司设备BFD的状态为init状态,对端为down状态
3、通过debug确认
*Sep 30 10:52:52:771 2019
SW1211-NPWG301-I10-H6800QF-PL-01 BFD/7/DEBUG: [K]Recv from OAM:Ctrl packet,
Src:10.93.123.10, Dst:10.93.123.9, Ver:1, Diag:0, Sta:1
P/F/C/A/D/M:0/0/0/0/0/0, Mult:5 LD/RD:1/0, Tx:1000ms, Rx:1000ms, EchoRx:500ms
*Sep 30 10:52:53:675 2019 SW1211-NPWG301-I10-H6800QF-PL-01 BFD/7/DEBUG:
Send:Ctrl packet, Src:10.93.123.9, Dst:10.93.123.10, Ver:1, Diag:0, Sta:1
P/F/C/A/D/M:0/0/1/0/0/0, Mult:5 LD/RD:257/0, Tx:1000ms, Rx:1000ms,
EchoRx:0ms
从debug来看,我司有收发控制报文,但是收到的Cisco的报文中携带了EchoRx:500ms的参数,怀疑因为这个参数导致两端BFD无法正常UP
4、建议协调Cisco侧排查该参数,Cisco修改自身的配置之后,BFD正常建立
协调Cisco工程师排查异常参数,修改Cisco的相关配置之后问题解决
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