客户反馈客户端侧查看组播业务数据时存在花屏的情况。根据此现象,怀疑是存在组播丢包导致的,随即我们开始了组播丢包问题的定位。
在S10500和75E
[GZ18&22-PIDS-LZ-ZX-SW-acl-ipv4-adv-3333]dis this
acl number 3333
rule 0 permit udp source 21.176.*.200 0 destination 238.1.*.150
0 destination-port eq 1234
#
停流后,流统情况如下:
##10500
Interface: GigabitEthernet1/0/0/15
Direction: Inbound
Policy: at
Classifier: at
Operator: AND
Rule(s) :
If-match acl 3333
Behavior: at
Accounting enable:
381552 (Packets)
0 (pps)
Interface:
Ten-GigabitEthernet2/1/0/44
Direction: Outbound
Policy: at
Classifier: at
Operator: AND
Rule(s) :
If-match acl 3333
Behavior: at
Accounting enable:
379740 (Packets)
0 (pps)
##S7500E
Interface:
Ten-GigabitEthernet2/0/26
Direction: Inbound
Policy: at
Classifier: at
Operator: AND
Rule(s) :
If-match acl 3333
Behavior: at
Accounting enable:
39392 (Packets)
0 (pps)
Interface:
GigabitEthernet2/0/17
Direction: Outbound
Policy: at
Classifier: at
Operator: AND
Rule(s) :
If-match acl 3333
Behavior: at
Accounting enable:
39392 (Packets)
0 (pps)
从如上流统情况可以看出:
S10506
即10分钟时间内,组播流量在S10506
进一步分析S10500上丢包的原因:
1
91720 (Packets) ===》打流过程中查询流统,入出方向计数相差600个报文左右
91133 (Packets)
Total
1 (*, G) entries; 6 (S, G) entries
Total
matched 0 (*, G) entries; 1 (S, G) entries
(21.176.*.200,
238.1.*.150)
Protocol: pim-dm, Flag: LOC ACT
UpTime:
00:22:26
Upstream interface: Vlan-interface1800
Upstream neighbor: NULL
RPF prime neighbor: NULL
Downstream interface information:
Total number of downstream interfaces: 2
1: Vlan-interface220
Protocol: pim-dm, UpTime: 00:03:46, Expires: -
2: Vlan-interface500
Protocol: pim-dm, UpTime: 00:22:26, Expires: -
97962 (Packets) ===》打流过程中查询流统,入出方向计数相差600个报文左右
97375 (Packets)
Total
1 (*, G) entries; 6 (S, G) entries
Total
matched 0 (*, G) entries; 1 (S, G) entries
(21.176.*.200,
238.1.*.150)
Protocol: pim-dm, Flag: LOC ACT
UpTime:
00:22:33
Upstream interface: Vlan-interface1800
Upstream neighbor: NULL
RPF prime neighbor: NULL
Downstream interface information:
Total number of downstream interfaces: 2
1: Vlan-interface220
Protocol: pim-dm, UpTime: 00:03:53, Expires: -
2: Vlan-interface500
Protocol: pim-dm, UpTime: 00:22:33, Expires: -
2
Total
1 (*, G) entries; 6 (S, G) entries
Total
matched 0 (*, G) entries; 1 (S, G) entries
(21.176.*.200,
238.1.*.150)
Protocol: pim-dm, Flag: LOC ACT
UpTime:
00:22:40
Upstream interface: Vlan-interface1800
Upstream neighbor: NULL
RPF prime neighbor: NULL
Downstream interface information:
Total number of downstream interfaces: 1
1: Vlan-interface500
Protocol: pim-dm, UpTime: 00:22:40, Expires: -
Total
1 (*, G) entries; 6 (S, G) entries
Total
matched 0 (*, G) entries; 1 (S, G) entries
(21.176.*.200,
238.1.*.150)
Protocol: pim-dm, Flag: LOC ACT
UpTime:
00:22:46
Upstream interface: Vlan-interface1800
Upstream neighbor: NULL
RPF prime neighbor: NULL
Downstream interface information:
Total number of downstream interfaces: 2
1: Vlan-interface220
Protocol: pim-dm, UpTime: 00:00:06, Expires: -
2: Vlan-interface500
Protocol: pim-dm, UpTime: 00:22:46,
Expires: -
在Vlan-interface220退出后又重新加入组播组的过程中,10500
106686 (Packets) ===》打流过程中查询流统,入出方向计数相差1373个报文。相比之前丢包增加了700多个报文。
105313 (Packets)
3
*Jul
20 16:28:18:596 2021 GZ22-PIDS-CTGZ-CZ IGMP/7/REPORT: -MDC=1; Received IGMPv2
report for group 238.1.*.150 on interface Vlan-interface2204(21.177.4.254)
(G161026)
*Jul
20 16:28:18:596 2021 GZ22-PIDS-CTGZ-CZ IGMP/7/REPORT: -MDC=1; Process IS_EX
packet for EXCLUDE group(238.1.*.150) on interface
Vlan-interface2204(21.177.4.254) (G116928)
*Jul
20 16:30:18:108 2021 GZ22-PIDS-CTGZ-CZ IGMP/7/REPORT: -MDC=1; Received IGMPv2
report for group 238.1.*.150 on interface Vlan-interface2204(21.177.4.254)
(G161026)
*Jul
20 16:30:18:108 2021 GZ22-PIDS-CTGZ-CZ IGMP/7/REPORT: -MDC=1; Process IS_EX
packet for EXCLUDE group(238.1.*.150) on interface
Vlan-interface2204(21.177.4.254) (G116928)
*Jul
20 16:32:22:599 2021 GZ22-PIDS-CTGZ-CZ IGMP/7/REPORT: -MDC=1; Received IGMPv2
report for group 238.1.*.150 on interface Vlan-interface2204(21.177.4.254)
(G161026)
*Jul
20 16:32:22:599 2021 GZ22-PIDS-CTGZ-CZ IGMP/7/REPORT: -MDC=1; Process IS_EX
packet for EXCLUDE group(238.1.*.150) on interface
Vlan-interface2204(21.177.4.254) (G116928)
4
Total
1 (*, G) entries; 6 (S, G) entries
Total
matched 0 (*, G) entries; 1 (S, G) entries
(21.176.*.200,
238.1.*.150)
Protocol: pim-dm, Flag: LOC ACT
UpTime:
01:06:37
Upstream interface: Vlan-interface1800
Upstream neighbor: NULL
RPF prime neighbor: NULL
Downstream interface information:
Total number of downstream interfaces: 2
1: Vlan-interface220
Protocol: pim-dm, UpTime: 00:03:58,
Expires: -
2: Vlan-interface500
Protocol: pim-dm, UpTime: 00:23:06, Expires: -
*Jul
20 15:19:19:275 2021 GZ18&22-PIDS-LZ-ZX-SW PIM/7/JP: -MDC=1; Send a JP
packet to interface Vlan-interface220. (PM09309)
*Jul
20 15:19:19:275 2021 GZ18&22-PIDS-LZ-ZX-SW PIM/7/JP: -MDC=1;
Upstream: 21.177.63.254, Groups: 1, Holdtime: 210 (PM09311)
*Jul
20 15:19:19:275 2021 GZ18&22-PIDS-LZ-ZX-SW PIM/7/JP: -MDC=1; Group: 238.1.*.150
--- 0 joins 1 prunes (PM09317) ===》剪枝动作
*Jul
20 15:19:19:275 2021 GZ18&22-PIDS-LZ-ZX-SW PIM/7/JP: -MDC=1;
Prune: 21.176.*.200 --- Flags: - (PM09321)
Total
1 (*, G) entries; 6 (S, G) entries
Total
matched 0 (*, G) entries; 1 (S, G) entries
(21.176.*.200,
238.1.*.150)
Protocol: pim-dm, Flag: LOC ACT
UpTime:
01:06:40
Upstream interface: Vlan-interface1800
Upstream neighbor: NULL
RPF prime neighbor: NULL
Downstream interface information:
Total number of downstream interfaces: 1 ====》Vlan-interface220退出了组播组
1: Vlan-interface500
Protocol: pim-dm, UpTime: 00:23:09, Expires: -
经如上分析,S10500上丢包的根因为:接收者发送的report
另外,与S10500/S75与传输对接的端口,收发光均正常,无CRC
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