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S5560X-54C-EI 接口频繁震荡

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zhiliao_ORAuDf

zhiliao_ORAuDf 二段

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问题描述：

S5560X-54C-EI是带外管理交换机，接一台S6800-54QF设备。S5560X-54C-EI的0/0/38口接口S6800-54QF的M-GigabitEthernet0/0/0，最近几天互联接口频繁Up/Down，S5560X-54C-EI设备端已换过接口和网线测试，还是会出现接口Up/Down告警。

S5560X-54C-EI下的配置：

interface GigabitEthernet1/0/38

port link-mode bridge

port access vlan XXX

stp edged-port

GigabitEthernet1/0/38

Current state: UP

Line protocol state: UP

IP packet frame type: Ethernet II, hardware address: 8c94-6a98-32c7

Description: GigabitEthernet1/0/38 Interface

Bandwidth: 1000000 kbps

Loopback is not set

Media type is twisted pair

Port hardware type is 1000_BASE_T

1000Mbps-speed mode, full-duplex mode

Link speed type is autonegotiation, link duplex type is autonegotiation

Flow-control is not enabled

Maximum frame length: 10000

Allow jumbo frames to pass

Broadcast max-ratio: 100%

Multicast max-ratio: 100%

Unicast max-ratio: 100%

PVID: 402

MDI type: Automdix

Port link-type: Access

Tagged VLANs: None

Untagged VLANs: 402

Port priority: 0

Last link flapping: 0 hours 19 minutes 17 seconds

Last clearing of counters: Never

Current system time:2026-08-21 15:38:53 CST+08:00:00

Last time when physical state changed to up:2026-08-21 15:19:36 CST+08:00:00

Last time when physical state changed to down:2026-08-21 15:19:32 CST+08:00:00

Peak input rate: 50775 bytes/sec, at 2026-08-21 09:03:16

Peak output rate: 3612 bytes/sec, at 2026-08-18 16:59:14

Last 300 seconds input: 0 packets/sec 52 bytes/sec 0%

Last 300 seconds output: 3 packets/sec 345 bytes/sec 0%

Input (total): 207786 packets, 65575801 bytes

134834 unicasts, 726 broadcasts, 72226 multicasts, 0 pauses

Input (normal): 207786 packets, - bytes

134834 unicasts, 726 broadcasts, 72226 multicasts, 0 pauses

Input: 0 input errors, 0 runts, 0 giants, 0 throttles

0 CRC, 0 frame, - overruns, 0 aborts

- ignored, - parity errors

Output (total): 6254967 packets, 696797911 bytes

140079 unicasts, 21493 broadcasts, 6093395 multicasts, 0 pauses

Output (normal): 6254967 packets, - bytes

140079 unicasts, 21493 broadcasts, 6093395 multicasts, 0 pauses

Output: 0 output errors, - underruns, - buffer failures

0 aborts, 0 deferred, 0 collisions, 0 late collisions

0 lost carrier, - no carrier

IPv4 traffic statistics:

Last 300 seconds input rate: 0 packets/sec, 0 bytes/sec

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

Input: 0 packets, 0 bytes

Output: 0 packets, 0 bytes

IPv6 traffic statistics:

Last 300 seconds input rate: 0 packets/sec, 0 bytes/sec

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

Input: 0 packets, 0 bytes

Output: 0 packets, 0 bytes

%Aug 18 13:42:20:110 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/38 changed to up.

%Aug 18 13:42:20:110 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/38 changed to up.

%Aug 18 13:42:22:400 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/38 changed to down.

%Aug 18 13:42:22:401 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/38 changed to down.

%Aug 18 13:43:02:747 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/38 changed to up.

%Aug 18 13:43:02:748 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/38 changed to up.

%Aug 18 13:43:04:566 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/38 changed to down.

%Aug 18 13:43:04:568 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/38 changed to down.

%Aug 18 13:45:32:569 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/38 changed to up.

%Aug 18 13:45:32:571 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/38 changed to up.

%Aug 18 13:45:33:322 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/38 changed to down.

%Aug 18 13:45:33:324 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/38 changed to down.

%Aug 18 13:45:37:648 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/38 changed to up.

%Aug 18 13:45:37:649 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/38 changed to up.

%Aug 18 15:28:43:524 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/38 changed to down.

%Aug 18 15:28:43:524 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/38 changed to down.

%Aug 18 15:28:47:218 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/38 changed to up.

%Aug 18 15:28:47:219 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/38 changed to up.

%Aug 18 15:28:59:001 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/38 changed to down.

%Aug 18 15:28:59:002 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/38 changed to down.

%Aug 18 15:29:01:682 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/38 changed to up.

%Aug 18 15:29:01:683 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/38 changed to up.

%Aug 18 15:29:05:740 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/38 changed to down.

%Aug 18 15:29:05:741 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/38 changed to down.

%Aug 18 15:29:16:682 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/38 changed to up.

%Aug 18 15:29:16:683 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/38 changed to up.

%Aug 18 15:29:23:076 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/38 changed to down.

%Aug 18 15:29:23:078 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/38 changed to down.

%Aug 18 15:29:25:759 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/38 changed to up.

%Aug 18 15:29:25:762 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/38 changed to up.

%Aug 20 15:02:58:399 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/38 changed to down.

%Aug 20 15:02:58:400 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/38 changed to down.

%Aug 20 15:03:04:232 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/38 changed to up.

%Aug 20 15:03:04:235 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/38 changed to up.

%Aug 20 15:05:08:198 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/38 changed to down.

%Aug 20 15:05:08:199 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/38 changed to down.

%Aug 20 15:05:10:925 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/38 changed to up.

%Aug 20 15:05:10:926 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/38 changed to up.

%Aug 21 15:19:32:962 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/38 changed to down.

%Aug 21 15:19:32:966 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/38 changed to down.

%Aug 21 15:19:36:108 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/38 changed to up.

%Aug 21 15:19:36:109 2026 SC-GDS-I06-MGT-H3CSW20 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/38 changed to up.

S6800-54QF下的信息：

interface M-GigabitEthernet0/0/0

ip binding vpn-instance Mgmt

ip address 10.158.32.176 255.255.255.0

M-GigabitEthernet0/0/0

Current state: UP

Line protocol state: UP

Description: M-GigabitEthernet0/0/0 Interface

Bandwidth: 1000000 kbps

Maximum transmission unit: 1500

Internet address: 10.158.32.176/24 (Primary)

IP packet frame type: Ethernet II, hardware address: 28c9-7aa5-9828

IPv6 packet frame type: Ethernet II, hardware address: 28c9-7aa5-9828

Last link flapping: 17 hours 56 minutes 40 seconds

Last clearing of counters: Never

Current system time:2026-08-21 09:01:54 beijing+08:00:00

Last time when physical state changed to up:2026-08-20 15:05:14 beijing+08:00:00

Last time when physical state changed to down:2026-08-20 15:05:10 beijing+08:00:00

Media type is twisted pair, loopback not set

Port hardware type is 1000_BASE_T

1000Mbps-speed mode , full-duplex mode

Link speed type is autonegotiation , Link duplex type is autonegotiation

input: 6167095 packets, 687838892 bytes

21278 broadcasts,6025138 multicasts

input: - input errors,- runts,- giants,- throttles,0 CRC

- frame,- overruns,- aborts,- ignored,- parity errors

output: 170773 packets, - bytes

725 broadcasts,71433 multicasts

output: - output errors,- underruns,- buffer failures

- aborts,- deferred,- collisions,- late collisions

- lost carrier,- no carrier

%Aug 20 15:03:00:507 2026 SC-GDS-I06-YW-H3CSW16 IFNET/3/PHY_UPDOWN: Physical state on the interface M-GigabitEthernet0/0/0 changed to down.

%Aug 20 15:03:00:507 2026 SC-GDS-I06-YW-H3CSW16 IFNET/5/LINK_UPDOWN: Line protocol state on the interface M-GigabitEthernet0/0/0 changed to down.

%Aug 20 15:03:06:760 2026 SC-GDS-I06-YW-H3CSW16 IFNET/3/PHY_UPDOWN: Physical state on the interface M-GigabitEthernet0/0/0 changed to up.

%Aug 20 15:03:06:760 2026 SC-GDS-I06-YW-H3CSW16 IFNET/5/LINK_UPDOWN: Line protocol state on the interface M-GigabitEthernet0/0/0 changed to up.

%Aug 20 15:03:07:483 2026 SC-GDS-I06-YW-H3CSW16 LLDP/6/LLDP_CREATE_NEIGHBOR: Nearest bridge agent neighbor created on port M-GigabitEthernet0/0/0 (IfIndex 1611), neighbor's chassis ID is 8c94-6a98-3278, port ID is GigabitEthernet1/0/38.

%Aug 20 15:05:10:340 2026 SC-GDS-I06-YW-H3CSW16 IFNET/3/PHY_UPDOWN: Physical state on the interface M-GigabitEthernet0/0/0 changed to down.

%Aug 20 15:05:10:342 2026 SC-GDS-I06-YW-H3CSW16 IFNET/5/LINK_UPDOWN: Line protocol state on the interface M-GigabitEthernet0/0/0 changed to down.

%Aug 20 15:05:14:642 2026 SC-GDS-I06-YW-H3CSW16 IFNET/3/PHY_UPDOWN: Physical state on the interface M-GigabitEthernet0/0/0 changed to up.

%Aug 20 15:05:14:645 2026 SC-GDS-I06-YW-H3CSW16 IFNET/5/LINK_UPDOWN: Line protocol state on the interface M-GigabitEthernet0/0/0 changed to up.

5 个回答

按时间按赞数

zhiliao_sEUyB

zhiliao_sEUyB 九段

粉丝：174人关注：11人

收集诊断联系400分析吧

zhiliao_YM

zhiliao_YM 八段

粉丝：22人关注：0人

这种可能是硬件故障，找400定位一下吧

zhiliao_Gixe

zhiliao_Gixe 八段

粉丝：15人关注：9人

排查步骤及命令
1. 检查两端接口协商参数
S5560X端：display interface GigabitEthernet 1/0/38 查看速率、双工模式，是否存在协商不一致、错包（CRC、帧错误）；
S6800端带外网管口：display interface M-GigabitEthernet 0/0/0 核对协商模式，建议两端均设为自协商，或强制相同速率/双工（speed 1000、duplex full）。
2. 检查接口震荡日志与统计
S5560X端：display logbuffer | include GigabitEthernet1/0/38 查看Up/Down时间间隔、关联事件；display counters error interface GigabitEthernet 1/0/38 查看物理层错误计数，若持续增长大概率是链路硬件问题。
3. 替换验证链路硬件
已换S5560端接口和网线，需更换S6800端带外网管口（若有备用）、更换成品网线（排除水晶头压接问题），测试是否仍震荡。
4. 检查STP与端口配置
互联口配置stp edged-port会导致STP状态异常震荡，需删除：

interface GigabitEthernet1/0/38
undo stp edged-port

同时确认两端VLAN配置匹配，S6800带外网管口为三层口时，S5560端access VLAN需与S6800管理口同网段。
5. 检查设备运行状态
display device 查看S5560X、S6800单板状态；display power 查看供电是否稳定，排除电源波动导致端口异常。

zhiliao_GeOM0O

zhiliao_GeOM0O 九段

粉丝：28人关注：2人

S5560X‑54C‑EI GigabitEthernet1/0/38 对接 S6800‑54QF M‑GigabitEthernet0/0/0 频繁物理层震荡
现象关键信息：
物理层反复 UP/DOWN，日志是 IFNET/3/PHY_UPDOWN，物理层直接 down，不是协议层震荡；
两端接口统计CRC、runts、giants 全部为 0，没有错包；
S5560X 侧已经更换物理端口、更换网线，故障依旧；
对端是 S6800‑54QF带外管理口 M‑GigabitEthernet0/0/0（CPU 板载管理网卡，不是业务交换芯片端口）；
S5560X 端口配置：port link‑mode bridge、port access vlan 402、stp edged‑port；两端均为自动协商 1000M 全双工。
核心根因：S6800 M‑GE 带外管理口是 CPU 板载独立网卡，和业务芯片网口 PHY 硬件驱动逻辑不一样；千兆自动协商存在 PHY 兼容抖动，无 CRC 报错，直接物理层闪断。网线、端口更换只能排除业务口故障，不能解决 M‑GE 管理口 PHY 协商兼容问题。
注意：M‑GigabitEthernet不支持强制 speed 1000 duplex full（该管理口硬件限制，不能关闭 auto‑negotiation 强制千兆），只能降级强制 100M 全双工规避协商震荡。
排查步骤（按顺序执行）
步骤 1：先确认硬件交叉测试，定位故障归属
将 S6800 M‑GE0/0/0 直接接一台 PC 千兆网卡，长时间观察是否还会 up/down。
如果接 PC 也震荡：故障在 S6800 M‑GE 管理口本身；
如果接 PC 稳定不震荡：是 M‑GE 与 S5560X 业务口 PHY 自动协商兼容问题，需要配置降级。
步骤 2：规避方案（现场最有效）
⚠️S6800 M‑GigabitEthernet0/0/0 硬件限制：不支持关闭自协商强制 1000M 全双工，只能强制 100M 全双工。
两端同时强制 100M 全双工，关闭自动协商：
S5560X 侧（G1/0/38）
plaintext
interface GigabitEthernet 1/0/38
speed 100
duplex full
undo negotiation auto
save
S6800‑54QF 侧 M‑GigabitEthernet0/0/0
plaintext
interface M‑GigabitEthernet 0/0/0
speed 100
duplex full
undo negotiation auto
save
配置完成后观察 2‑4 小时，确认不再出现 PHY_UPDOWN。
带外管理流量很小，100M 带宽完全足够管理业务。
步骤 3：不希望降速到 100M 的备选方案
不要使用 S6800 的 M‑GE 带外管理口做带外互联，改用 S6800 业务板普通千兆电口做带外管理，业务芯片 PHY 与 S5560X 完全兼容，千兆自协商稳定。（推荐长期方案）
升级 S6800‑54QF 设备版本，部分版本优化 M‑GE 管理口 PHY 协商驱动，有可能改善，但不能保证根治。
步骤 4：排除次要风险点
S5560X 端口配置stp edged‑port，该特性是 STP 协议层面，不会造成物理层 PHY 直接 down，可以保留；
接口统计 0 错误，说明不是网线质量问题，你已经换过网线，不需要反复更换网线；
不是环路问题：环路只会导致协议层震荡，不会直接物理层 PHY down；
M‑GE 管理口属于 CPU 板载网卡，查看 S6800 设备环境，确认设备温度无高温告警：
plaintext
display environment
诊断命令收集
plaintext
#清零接口统计，后续观察是否产生错误包
reset counters interface GigabitEthernet 1/0/38
reset counters interface M‑GigabitEthernet 0/0/0

#查看M‑GE管理口硬件信息
display interface M‑GigabitEthernet 0/0/0
display environment
display version