这两天上班没啥事情，看看之前为客户做的写报告啥的，弄来和大家分享分享。

这个是客户DL网络升级，最后两个交换机产品的一个比较，其实 这两个产品根本就没啥可比性的，但是需要拿出数据出来，还有别的原因吧，大家干这行的可能都懂的

監控目的：對比現有SWDL網絡中，core switch使用CISCO2960G及CISCO4948兩種不同型號設備是否有達到產線SWDL網絡需求，設備各項性能差異。

監控網絡拓撲：

Machine generated alternative text: server • I • I • I • I I I I I I I I I I • I • I I I I • I I

注：Core switch如拓撲圖中紅色框中設備。

         監控網絡拓撲一樣，採用端口綁定，接入端交換機配製一樣。

 

一：監控K線及B線兩條線SWDL網絡

         K線core switch使用CISCO 2960G，B線core switch使用cisco 4948

        監控對象：K線core switch CISCO2960G      B線 core switch cisco 4948

        監控時間：K線（6/25 14:00-6/28 9:00 ）   B線（6/26 19:00-6/28 9:00）

        監控情況對比如下：

Average response time ：CISCO2960G 4.25ms    CISCO 4948 1.5ms

Machine generated alternative text: SWD L-KCORE-2960G Average Response Tine & Packet Loss Last 7 Days L-J — Response Tine % Packet Loss 4.Sms - ________________ tons In 23$ ma 8 3.0 us E 2.S us 100% 0.0 us 2lMon 22Tue 23Wed 24Thu 2SFh 26Sat 27Sun 28Mon Jun 2010

 

buffer allocation failures/misses：CISCO 2960有miss，CISCO 4948沒有miss

Machine generated alternative text: SWDL4CCOREe2960G biter Alecelen Fstnslêses Last? Days Lea? Days I I I ii I 111111111111111 liii C 0 L tkceIIon Pebi’es Saul MAsse Medbm Mien lEg MAsse Large MAsse Huge c:t S 2 I I III ‘II II I flu flied 241w SPit 2SSst SMee

 

Errors  today（top 10）：CISCO 2960G 在port-channel上都有discard，CISCO 4948在port-channel上沒有（圖中為4948直接接客戶端丟棄掉一個包）

Machine generated alternative text: Errors Today (Top 10) 2010S28 Ol — — — — 9ecehe Dros 9eceIR Enors Trnnl Dcards Trwwnl Errors TcaI Errors Toj :--:cE-D?-a-ret-poL — — SVD-k-COE-296OGGIgaiOem113 - - - sNDt-x-coqE-zc’5x--ort-nneI1 - Pol SAt -K COE-2%)-4;aDeeneQY4- G S.va-K-cQ’iE-oG-vIr1 -Vii - P02 sAt4.-K-c09f-2960G-Porl-nrel3 - Po3 SAaK-coE-2x—Port-awreL5 - ‘OS

 

PO 1 -PO 5端口的transmit total discard per 2 hours 情況對比

    可以看出CISCO2960做core時 po1-4都有不同程度的丟包，而CISCO4948做core時po1-4完全沒有丟包現象   

注：SWDL架構中core switch po1-5下行數據包占絕大部份，且所有數據包都都是通過po1-5上行下行傳輸

Machine generated alternative text: SWDL-K-CORE-2960G-Port-channell - P01 Total ErrorsiUtscards Every 2 Hours Last 7 Days C — — Receive Errors Receive Discards Transnw Errors Transmfl Discards ________________________ ____________________________ I (0 -c - 525 C-) Cl) 0 20 10 211Ion 22Tue 23Wed 24Thu 2SFn Jun 2010

 

Machine generated alternative text: SWDL-K-CORE-2960G-Port-channel2 - P02 Total ErrorsdD,scards Every 2 Hours Last 7 Days Lz] — Z Receive Errors Recerve Discards Transnl Errors Transmfl Discards 35 C, 2Ot 10 5 — 21 Mon Jun 2010 22Tue 23Wed 24Thu 2SFfl 26Sat 27Sun 2BMon

 

Machine generated alternative text: SWDL-K-CORE-2960G-Port-channel3 . P03 ToW ErronOecedi Eveiy 2 Hours Liii? Guys — — I.- Tmfl WuM Dbfl I I I I 23Wed 2411w 2SPd VSI 2811cc

 

Machine generated alternative text: 21 Mon Jun 2010 Receive Errors — Recerte Discards Transn Errors — Transmit Discards SWDL-K-CORE-2960G-Port-channel4 - P04 Total ErrorsiDiscards Every 2 Houri Last 7 Days 20 I C I I I I II II 22Tue 23 Wed 24Thu 2SFri 26Sat 27 Sun 28Mon

 

        監控Core switch接server端口流量：CISCO 2960G CISCO 4948都正常

K 線Core switch CISCO 2960G：

Machine generated alternative text: SWDL-K-CORE-2960G-GigabitEthernetO/45 - Gi0145 MinlMaxIAverage Percent Utilization of Recv 1.0 Gbps Xmit 1.0 Gbps Last 7 Days — LJ — Mm/Max Receive Utilization Mm/Max Transmit Utilization Average Receive Utilization Average Transmit Utilization 100% 90% 80% 70% 60% 50% 40% 30% - 20% 10% 0% 21 Mon 22 Tue 23 Wed 24 Thu Jun 2010 27 Sun 28 Mon

 

Machine generated alternative text: SWDL-K-CORE-2960G-GigabitEthernetOi46 - Gi0146 MmlMaxlAverage Percent Utdization of Recv 1.0 Gbps Xn 1.0 Gbps Last 7 Days — LJ — IiIi’Vhlax Recer’e Utilzation MIVUax Transmit Ut*zation Average Recewe Utilization Average Transm Utzatmn _______ I. 50% 40% 30% 20% 10% 0% I I 21 Uon 22 Tue 23 Wed 24 Thu 25 Fri 26 Sat 27 Sun 28 Mon Jun 2010

 

B 線Core switch CISCO 4948：

Machine generated alternative text: SWDL-B-CORE-4948-GigabitEthernetl/25 . Gi1125 Mm/Max/Average Percent Utlization of Recv 1.0 0bps Xrn* 1.0 0bps Last 7 Days — Ui — Mm/Max Receive Utization Mi-iMax Transmit Utization Average Recerve Utdization Average Transrmt Uttzatmn 80% 70% 60%; 40% 30%; 10% 0% 21 Jun 2010

 

Machine generated alternative text: SWDLeBeCOREe4948eGigabitEthernetl /26 - Gil 126 Mr/Max/Average Percent Utilization of Recv 1.0 Gbps Xnt 1.0 Gbps Last 7 Days — LJ — MWVMax Receive Uttzation Mrnfldax Transmit Utilization Average Receive Utilization Average Transmt Uttzation Jun 2010 ii

 

Machine generated alternative text: SWDL-B-CORE.4t484IgabItEthemetlI45 - G11145 UbWMnIAvemge Petc (,aq if Recv 1.0 dpi Xi* 1.0Gbps La? Deys — MEWUn ReceWs IP”-* UlimnTmneet tPaaa Avenge ReLeha t’-n g0%; 80%! 70% 10% 2lMcn flTus 23VVed 247hu 2SFd 2BSet 278im 28Mm Jun2010

 

Machine generated alternative text: SWDLeBeCORE494BeGigabitEthernetl 146 - Gi1146 MinlMniAverage Percent Utikzaton of Recv 1.0 0bps Xm 1.0 0bps Last 7 Days — LJ — MmIMax Receive LJt*zation UeiMax Transmit Utilization Average Receive Utilization Average Transitil Utization 90% 80%f 70% F 2lMon 22Tue 23Wed 24Thu 2SFri 26Sat 27Swi 28Mon Jun 2010

 

Machine generated alternative text: SWDLeB..COREe4948eGigabitEthernetll47 . Gi1147 Min/M ax/Average Percent Utilization of Recv 1.0 0bps Xmit 1.0 0bps Last 7 Days S LJ — Mm/Max Receive Ut*zation Mmfldax Transmit Utizabon Average Receive Utilization Average Transrrwt Ut*zabon 80%j 70% 3%r 7flt I 21 Mon 22Tue 23 Wed 24Thu 25 Fri 26 Sat 27 Sun 28 Mon Jun 2010

 

 

二：監控G線SWDL網絡

監控SWDL G 線core switch 情況如下：

監控對象：SWDL G line CORE Switch（CISCO 2960G   VS  CISCO 4948）

監控時間：CISCO 2960G（6/24 18:00-22:00）      CISCO 4948（6/24 22:00-6/25 7:30 ）    

監控對比情況如下：

1.交換機 buffer allocation failures/misses 情況對比（左邊為CISCO2960G 右邊為CISCO4948）

可以看出CISCO2960G buffer有misses,而CISCO4948都沒有

 

2.PO 1-5 transmit total discard per 2 hours 情況對比

注：SWDL架構中core switch po1-5下行數據包占絕大部份，且所有數據包都都是通過po1-5上行下行傳輸

可以看出CISCO2960做core時 po1-5都有不同程度的丟包，而CISCO4948做core時po1-5完全沒有丟包現象

 

 

 

 

 

 

 

 

 

 

分析監控的數據得出如下結論：

CISCO 2960G 做為SWDL CORE switch時，因本身性能問題，switch下行方向有嚴重丟包，且隨著下行方向的數據量的增加，丟包會更越嚴重。達不到SWDL網絡目前的需求。

CISCO 4948 做SWDL CORE switch時，網絡正常，能達到SWDL網絡需求。

 

附：CISCO 2960G 和CISCO 4948性能比較

設備型號

CISCO2960

CISCO 4948

引擎系列

2960系列，應用於網絡邊緣區域

45系列，部署在網絡關鍵應用區域，data center級產品

工作協議層

二層

二、三、四層

背板帶寬

32G

96G

組播模式

軟件組播

硬件組播

電源冗餘

不支持

支持2個電源冗餘

支持最大鏈路捆綁

8條

8條

最大支持port-channel數

6

64

  關於CISCO 2960G和CISCO 4948詳細性能比較見：

http://product.zdnet.com.cn/109/108147/param.shtml

http://product.zdnet.com.cn/109/108155/param.shtml

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Machine generated alternative text: SWDL-B-CORE-4948 Average Response Tine & Packet Loss Last 7 Days Response Tine % Packet Loss 100% 1.4ms 0 12ms _____— 70% .. ________ —— ___-________ E C 0) 50% 40% ________ _____ ___ 30% _________ _____ 20% 0.2rT5 . 10% 0.Omsui I 21 Mon 22Tue 23 Wed 24Thu 25Fn 26Sat 27 Sun 2BMon Jun 2010

 

Machine generated alternative text: SWDL-B-C0RE4948 Buffer Alocation Fares/Misses Last 7 Days Last 7 Days — — — _ 10 Alocation Failures Small Misses Medium Misses Big Misses Large Misses Huge Messes 9 8 7 6 C 5. - 4 3 2 0 I I 2lMon 22Tue 23Wed 24Thu 2SFri 265at 275un 28Mon Jun 2010

 

Machine generated alternative text: Errors Today (Top 10) 2O1Q 33 — — — — - irwr Ocwci 1r,*, errots 1’ii rjror. To 00 0’ 02 03 3i 05 6 07 01 09 10 riir1T IT i—rr 1TIrTrr 11—j— 1irrrIT :--: — — - s —: : _-—: - 5.+cO-sdo4ç.eJwmv$. sL-eo-494aGai - - 04 9-

 

Machine generated alternative text: SWDLeBCORE4948ePortchannell e P01 ToW Enorebcwds Every 2 Hours LaM 7 Deys izi — — Rec*se Eners Receka Dbcfl Tmee.U Errors Treeent Dbcfl 10 a I I I I I 22Tue 23Wed 24Thu 2SPd flSou liNen

 

Machine generated alternative text: SWDL-B-CORE-4948-Port-channel2 - P02 Total ErrorsdDiscards Every 2 Hours Last 7 Days I — Ui — Receive Errors Recewe Discards TransiM Errors Transmit Discards 9 8 7 6 4 3 2 o 2114on 22Tue 23Wed 24Thu 2SFri 26Sat 27Sun 28Mon Jun 2010

 

Machine generated alternative text: SWDL4(CORE-2960G..Port-channel3 . P03 lalil ErmmIecwds Every 2 Heirs La? Os = — — --F Ewes -F Dflts Tmna Dms Wnn* DSfl in 6 5S.. 4 2 I a I I I I I 22Tue 23Wed ZTbu 2SFrI 2$S flSis flhloe

 

Machine generated alternative text: a 2 SWDL-B-CORE-4948.Port-chann&4. P04 TdeI ErromCbcfl Evey 2 flouts Lea? Ceys — --I- Dma = Recoin Erie’s 9 6 7 6 S 4 a a I I I - I flied 221km 2411w SPit 28S 26 Moe

 

 

Machine generated alternative text: SWDL-G-CORE-4948-Port-channell . P01 Total Errors/Discards Every 30 Minutes Today C — — Receive Errors Receive Discards Transnd Errors Transmit Discards 10• 8- 7- 0 i I S I S I I I S 25Fri 0:30 1:00 1:30 2:00 2:30 3:00 3:30 4:00 4:30 5:00 5:30 6:00 6:30 7:00 7:30 8:00 8:30 Jun 2010