某局点UNIS S6600XPG 接入现网后导致网络延时变大

接入6600XP后，核心ping cisco设备有较大延时

接入前网络中延时：

<7800XP-IRF>dis ip int bri | in 50

Vlan50              up       up        192.x.x.5  /25   --      

<S7800XP-IRF>ping 192.x.x.6

Ping  192.x.x.6  ( 192.x.x.6  ): 56 data bytes, press CTRL+C to break

56 bytes from  192.x.x.6  : icmp_seq=0 ttl=254 time=5.087 ms

56 bytes from  192.x.x.6  : icmp_seq=1 ttl=254 time=1.617 ms

56 bytes from  192.x.x.6  : icmp_seq=2 ttl=254 time=3.368 ms

56 bytes from  192.x.x.6  : icmp_seq=3 ttl=254 time=1.658 ms

56 bytes from  192.x.x.6  : icmp_seq=4 ttl=254 time=4.395 ms

 接入后网络中延时：

[YGNL18F-OA-HXSW-S7800XP-IRF]ping 192.x.x.6

Ping 192.x.x.6 (192.x.x.6): 56 data bytes, press CTRL+C to break

56 bytes from 192.x.x.6: icmp_seq=0 ttl=254 time=181.926 ms

56 bytes from 192.x.x.6: icmp_seq=1 ttl=254 time=42.038 ms

56 bytes from 192.x.x.6: icmp_seq=2 ttl=254 time=47.680 ms

56 bytes from 192.x.x. 6: icmp_seq=3 ttl=254 time=20.431 ms

56 bytes from 192.x.x.6: icmp_seq=4 ttl=254 time=61.232 m

1、7800XP 和思科互联的接口配置

#

interface Bridge-Aggregation1

port link-type trunk

port trunk permit vlan all

stp port bpdu-filter enable

#

2、最早就是聚合情况下中断的，为了规避光电转换器的问题，选择聚合单线路测试，而且现在如此高的流量感觉明显不太正常

7800XP   和思科互联接口流量较大，配的聚合，暂时只有一根线使用。

Ten-GigabitEthernet1/0/31

Current state: UP

Line protocol state: UP

Description: Ten-GigabitEthernet1/0/31 Interface

Bandwidth: 1000000 kbps

Peak input rate: 27293925 bytes/sec, at 2023-02-21 15:12:29

 Peak output rate: 108555826 bytes/sec, at 2023-02-25 15:37:10

 Last 300 seconds input: 247 packets/sec 47129 bytes/sec 0%

Last 300 seconds output: 524942 packets/sec 77191232 bytes/sec 70%

Vlan-interface50

Current state: UP

Line protocol state: UP

Bandwidth: 1000000 kbps

Maximum transmission unit: 1500

Last 300 seconds input rate: 151 bytes/sec, 1208 bits/sec, 2 packets/sec

Last 300 seconds output rate: 28 bytes/sec, 224 bits/sec, 0 packets/sec

Input: 18822 packets, 1510940 bytes, 3482 drops

Output: 1854 packets, 90884 bytes, 0 drops

看设备CPU也正常

  ===============display cpu=============== 

Slot 1 CPU 0 CPU usage:

       2% in last 5 seconds

       3% in last 1 minute

       3% in last 5 minutes

Slot 2 CPU 0 CPU usage:

       2% in last 5 seconds

       2% in last 1 minute

       2% in last 5 minutes

3、

接上去的66 XP只有一个接口UP的，其他的都是堆叠和MAD口，不像有环路

  ===============display interface brief=============== 

XGE1/0/45            UP   10G(a)    F(a)   T    1   

XGE1/0/46            UP   10G(a)    F(a)   A    1    IRF-MAD

XGE1/0/47            UP   10G(a)    F(a)   --   --  

XGE1/0/48            UP   10G(a)    F(a)   --   --  

XGE2/0/46            UP   10G(a)    F(a)   A    1    IRF-MAD

XGE2/0/47            UP   10G(a)    F(a)   --   --  

XGE2/0/48            UP   10G(a)    F(a)   --   --  

 互联接口发出的流量很大，按理说这个设备没有流量才对

Ten-GigabitEthernet1/0/45

Current state: UP

Line protocol state: UP

Bandwidth: 10000000 kbps

Loopback is not se

PVID: 1

MDI type: Automdix

Port link-type: Trunk

VLAN Passing:   1(default vlan), 10-11, 14-17, 19-22, 30-31, 34, 38, 40-43

                 45-48, 50

VLAN permitted: 1(default vlan), 10-11, 14-17, 19-22, 30-31, 34, 38, 40-43

                 45-48, 50

Trunk port encapsulation: IEEE 802.1q

 Last 300 seconds input: 53 packets/sec 4643 bytes/sec 0%

Last 300 seconds output: 6544012 packets/sec 500480791 bytes/sec 51%

5、查看接口出入确实流量异常，被打满，堆叠口和BFD口流量也很大，开始怀疑堆叠口和检测口环了

6、再次检查配置

Mad检测的vlan是4000，接口放的是vlan1，IRF接口pvid也是1，接入网络的接口PVID也是1，导致VLAN1流量环路了

#

interface Vlan-interface4000

mad bfd enable

mad ip address 1.1.1.1 255.255.255.252 member 1

mad ip address 1.1.1.2 255.255.255.252 member 2

#

#

interface Ten-GigabitEthernet1/0/46

port link-mode bridge

description IRF-MAD

undo stp enable

#

规范配置，修改mad检测口放通vlan