PDF《解决方案》

目录 简介 问题 解决方案 相关的思科支持社区讨论 简介 本文目的将显示如何修改在思科连结7000 (N7k)思科连结7000 48波尔特1的入口缓冲区和万兆以太 网F2-Series模块(F2)和思科连结7000增强版F2-Series 48波尔特光纤1和万兆以太网虚拟通道的3 (VL3)模块(F2e)线路卡.

并且,您看到相当数量入口您为VL3获取以后的缓冲能力正在修改这些值. 问题 使用在以太网(FCoE)多跳跃连接的光纤通道在距离的Datacenters之间了不起的比2公里能导致输入 丢弃.默认情况下, F2/F2e线路卡有0页在排队数据包的延迟缓冲区在暂停以后发送,并且这将导 致在长途FCoE多跳跃接口的输入丢弃. 延迟缓冲区定义如下: PL_STOP - HWM (PL_Pause) = LB (延迟缓冲区) 您注意以上提到的值显示作为页.每个页是大致384个字节. 公告下面, VL3入口缓冲区缓冲能力与默认FCoE QoS策略的: EX module-10# show hardware internal mac port

1 qos configuration | begin IB | end EB IB Port page limit :

3584 (1376256 Bytes) VL# HWM pages(bytes) LWM pages(bytes) Used PL_STOP(HWM &

LWM) SPAN pages THR

0 1107 ( 425088)

1035 ( 397440)

0 1107

1035 100

1 2 ( 768)

1 ( 384)

0 2

1 1

2 2 ( 768)

1 ( 384)

0 2

1 1

3 1053 ( 404352)

1029 ( 395136)

0 1053

1029 100

4 1107 ( 425088)

1083 ( 415872)

0 1107

1083 100

5 231 ( 88704)

159 ( 61056)

0 231

159 57

6 2 ( 768)

1 ( 384)

0 2

1 1

7 2 ( 768)

1 ( 384)

0 2

1 1 Credited DWRR WT:

216 (0xd8) Uncredited DWRR WT:

144 (0x90) DWRR honor UC = FALSE Leak Lo weight = 0xd8, enabled = FALSE EB PL_STOP和高水位标记(HWM)有价值.您能看到默认情况下延迟缓冲区有0页.支持将需要修改这 些值的长途FCoE. 解决方案 首先您将需要复制'

default-4q-7e-in-policy服务质量(QoS)策略映射: module-10# show hardware internal mac port

1 qos configuration | begin IB | end EB IB Port page limit :

3584 (1376256 Bytes) VL# HWM pages(bytes) LWM pages(bytes) Used PL_STOP(HWM &

LWM) SPAN pages THR

0 1107 ( 425088)

1035 ( 397440)

0 1107

1035 100

1 2 ( 768)

1 ( 384)

0 2

1 1

2 2 ( 768)

1 ( 384)

0 2

1 1

3 1053 ( 404352)

1029 ( 395136)

0 1053

1029 100

4 1107 ( 425088)

1083 ( 415872)

0 1107

1083 100

5 231 ( 88704)

159 ( 61056)

0 231

159 57

6 2 ( 768)

1 ( 384)

0 2

1 1

7 2 ( 768)

1 ( 384)

0 2

1 1 Credited DWRR WT:

216 (0xd8) Uncredited DWRR WT:

144 (0x90) DWRR honor UC = FALSE Leak Lo weight = 0xd8, enabled = FALSE EB 在您之下将看到相当数量字节分配到VL3延迟缓冲区,以后正在修改服务策略. 注意:您将看不到延迟缓冲区,直到您分配队列极限的至少60%对 ndrop 策略的. 策略将被修改增量10, 99% 60/40 ingess buffer allocation=policy-map type queuing 7I_4q-7e-in class type queuing c-4q-7e-drop-in service-policy type queuing 7I_4q-7e-drop-in queue- limit percent

40 class type queuing c-4q-7e-ndrop-in service-policy type queuing 7I_4q-7e- ndrop-in queue-limit percent 60interface Ethernet2/5 service-policy type queuing input 7I_4q-7e-inmodule-2# show hardware internal mac port

5 qos configuration | begin IB | end EB IB Port page limit :

3584 (1376256 Bytes) VL# HWM pages(bytes) LWM pages(bytes) Used PL_STOP(HWM &

LWM) SPAN pages THR

0 624 ( 239616)

576 ( 221184)

0 624

576 100

1 2 ( 768)

1 ( 384)

0 2

1 1

2 624 ( 239616)

576 ( 221184)

0 624

576 100

3 1913 ( 734592)

1889 ( 725376)

0 2126

1889 100

4 2 ( 768)

1 ( 384)

0 2

1 1

5 124 ( 47616)

52 ( 19968)

0 124

52 31

6 2 ( 768)

1 ( 384)

0 2

1 1

7 2 ( 768)

1 ( 384)

0 2

1 1 Credited DWRR WT:

216 (0xd8) Uncredited DWRR WT:

144 (0x90) DWRR honor UC = FALSE Leak Lo weight = 0xd8, enabled = FALSE EB 60/40将分配81792个字节到vl3延迟缓冲区. PL_STOP - HWM * 384个字节 2126个- 1913年= 213pages * 384个= 81792个字节 70/30 ingress buffer allocation=policy-map type queuing 7I_4q-7e- in class type queuing c-4q-7e-drop-in service-policy type queuing 7I_4q-7e-drop-in queue- limit percent

30 class type queuing c-4q-7e-ndrop-in service-policy type queuing 7I_4q-7e- ndrop-in queue-limit percent 70interface Ethernet2/5 service-policy type queuing input 7I_4q-7e-inmodule-2# show hardware internal mac port

5 qos configuration | begin IB | end EB IB Port page limit :

3584 (1376256 Bytes) VL# HWM pages(bytes) LWM pages(bytes) Used PL_STOP(HWM &

LWM) SPAN pages THR

0 463 ( 177792)

415 ( 159360)

0 463

415 100

1 2 ( 768)

1 ( 384)

0 2

1 1

2 463 ( 177792)

415 ( 159360)

0 463

415 100

3 1987 ( 763008)

1963 ( 753792)

0 2484

1963 100

4 2 ( 768)

1 ( 384)

0 2

1 1

5 88 ( 33792)

16 ( 6144)

0 88

16 22

6 2 ( 768)

1 ( 384)

0 2

1 1

7 2 ( 768)

1 ( 384)

0 2

1 1 Credited DWRR WT:

216 (0xd8) Uncredited DWRR WT:

144 (0x90) DWRR honor UC = FALSE Leak Lo weight = 0xd8, enabled = FALSE EB 70/30分配190848个字节到VL3延迟缓冲区. policy-map type queuing 7I_4q-7e-in class type queuing c-4q-7e-drop-in service-policy type queuing 7I_4q-7e-drop-in queue-limit percent

20 class type queuing c-4q-7e-ndrop-in service-policy type queuing 7I_4q-7e-ndrop-in queue-limit percent 80interface Ethernet2/5 service-policy type queuing input 7I_4q-7e-inmodule-2# show hardware internal mac port

5 qos configuration | begin IB | end EB IB Port page limit :

3584 (1376256 Bytes) VL# HWM pages(bytes) LWM pages(bytes) Used PL_STOP(HWM &

LWM) SPAN pages THR

0 302 ( 115968)

254 ( 97536)

0 302

254 75

1 2 ( 768)

1 ( 384)

0 2

1 1

2 302 ( 115968)

254 ( 97536)

0 302

254 75

3 1875 ( 720000)

1851 ( 710784)

0 2841

1851 100

4 2 ( 768)

1 ( 384)

0 2

1 1

5 52 ( 19968)

46 ( 17664)

0 52

46 13

6 2 ( 768)

1 ( 384)

0 2

1 1

7 2 ( 768)

1 ( 384)

0 2

1 1 Credited DWRR WT:

216 (0xd8) Uncredited DWRR WT:

144 (0x90) DWRR honor UC = FALSE Leak Lo weight = 0xd8, enabled = FALSE EB ?80/20分配370944个字节到VL3延迟缓冲区. policy-map type queuing 7I_4q-7e-in class type queuing c-4q-7e-drop-in service-policy type queuing 7I_4q-7e-drop-in queue-limit percent

10 class type queuing c-4q-7e-ndrop-in service-policy type queuing 7I_4q-7e-ndrop-in queue-limit percent 90interface Ethernet2/5 service-policy type queuing input 7I_4q-7e-inmodule-2# show hardware internal mac port

5 qos configuration | begin IB | end EB IB Port page limit :

3584 (1376256 Bytes) VL# HWM pages(bytes) LWM pages(bytes) Used PL_STOP(HWM &

LWM) SPAN pages THR

0 141 ( 54144)

93 ( 35712)

0 141

93 35

1 2 ( 768)

1 ( 384)

0 2

1 1

2 141 ( 54144)

93 ( 35712)

0 141

93 35

3 1055 ( 405120)

1031 ( 395904)

0 3199

1031 100

4 2 ( 768)

1 ( 384)

0 2

1 1

5 16 ( 6144)

10 ( 3840)

0 16

10 4

6 2 ( 768)

1 ( 384)

0 2

1 1

7 2 ( 768)

1 ( 384)

0 2

1 1 Credited DWRR WT:

216 (0xd8) Uncredited DWRR WT:

144 (0x90) DWRR honor UC = FALSE Leak Lo weight = 0xd8, enabled = FALSE EB ?90/10分配823296个字节到VL3延迟缓冲区 policy-map type queuing 7I_4q-7e-in class type queuing c-4q-7e-drop-in service-policy type queuing 7I_4q-7e-drop-in queue-limit percent

10 class type queuing c-4q-7e-ndrop-in service-policy type queuing 7I_4q-7e-ndrop-in queue-limit percent 90interface Ethernet2/5 service-policy type queuing input 7I_4q-7e-inmodule-2# show hardware internal mac port

5 qos configuration | begin IB | end EB IB Port page limit :

3584 (1376256 Bytes) VL# HWM pages(bytes) LWM pages(bytes) Used PL_STOP(HWM &

LWM) SPAN pages THR

0 141 ( 54144)

93 ( 35712)

0 141

93 35

1 2 ( 768)

1 ( 384)

0 2

1 1

2 141 ( 54144)

93 ( 35712)

0 141

93 35

3 1055 ( 405120)

1031 ( 395904)

0 3199

1031 100

4 2 ( 768)

1 ( 384)

0 2

1 1

5 16 ( 6144)

10 ( 3840)

0 16

10 4

6 2 ( 768)

1 ( 384)

0 2

1 1

7 2 ( 768)

1 ( 384)

0 2

1 1 Credited DWRR WT:

216 (0xd8) Uncredited DWRR WT:

144 (0x90) DWRR honor UC = FALSE Leak Lo weight = 0xd8, enabled = FALSE EB ?99/1分配906240个字节到VL3延迟缓冲区 注意:每飞剪机asic有缓冲能力6MB.有每架飞剪机4个端口,因此这等同于对~1.5MB缓冲能力每 个端口.使用99/1您看到~.9MB分配到VL3延迟缓冲区,并且HWM使用剩余每个VL (对VL3的多数 ).当添加与VL3 LB的每VLs HWM您将看........