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[LAB战报] Passed !!! Thank you all !!!

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发表于 2017-3-16 10:43:33 | 显示全部楼层 |阅读模式
Passed the exam  a few days back, and got all new! I am so grateful for this forum members, for everyone who shared their feedbacks, who raised interesting discussions, and everyone who answered to my questions in discussions 5 B  A( U8 i' G! B
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I feel obligated and happy to share my feedback and tips.3 s+ s  r- F. i3 l! a! P9 D

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" P9 I% A/ g! MGeneral info and tips:
  • Keyboard and mouse are OK. They are not latest and greatest, but personally did not have any problems with them, usual ones that we have with PCs.
  • Browser, and dragging it, and opening new console are slow, so it will make you nervous at the beginning. But you will get used to it after 2-3 tickets. So please be ready for this slow browser, and it is better to bring some chew gums (or maybe some drinks) so that it can help to reduce stress on you.
  • Lab room temperature is cold. Even with hoodies I felt cold time by time. So please do not forget to bring your warm clothes, if you feel hot you can always just take off.
  • Timing. In Diag section we have exact 30min, and even if we finish earlier, we must wait till 30min countdown ends. Please use this time wisely, if we finish it early and confident about answers, we can go to restroom or have some drinks, so we avoid having these breaks in Config section and save time for that.
  • The most important is please have enough sleep. We cannot learn so much the day before the exam, and overstudying will hurt on exam day. I suggest use the day before exam as review of your notes, and actually wake up very early the day before exam, and you can sleep earlier. I went to bed about 10:30 and could not sleep for 2 hours, and got up around 5:30 so total slept 5 hours. In the first half of the lab it was OK, but on the 2nd half I felt sleepy for about 30min and could not concentrate well during that period. So please get up earlier and go to sleep earlier the day before the exam, and dont study too much, your brain should be fresh.
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) K9 D8 N  ^6 m  o/ b- G6 v& v0 x# AIt was new TS, no new faults. I was nervous at beginning because of slow browser, and had to take full extra 30min from Config section. It helped much, I found my mistakes when doing verification during this 30min.
  • No vlan-access map 20 that forwards everything. No need to modfy ACL. Change DHCP lease time from 2 hours to default 1 day. After fixing vlan access-map everything was working, but towards end of lab, when I verified, there was no IP on host. Just increased lease time. Same for Tkt8.
  • No next-hop-self on R14/R5
  • Changed cost on lots of interface to match output. Edited acl on R12/R22 to match LAN subnet
  • There is pre-configured route-map on R21, just changed LP to 101
  • DMVPN OSPF network type changed from P2P to P2MP
  • R15 was not redistributing OSPF IPv6 network
  • R3 not importing R5's export. R1 Loopback is not advertised into OSPF. OSPF cost change on R10/R11 to match trace
  • No "ip dhcp relay information trust" on Relay Switches
  • Tunnel key mismatch
  • "ip nat inside static ...."  is pre-configured, just changed it to "ip nat outside static ...." Both R24 and R25 are NAT routers. After telnet, sh users must display R25's WAN interface. it means no need for "add-route" and no need to change IP of loopback. Pretty basic.& n4 \7 s, S  J% k8 t8 n& V5 H6 E

0 u# `! _9 A9 k3 D8 fDiag:
  • DHCP Snooping and TCL - same as in forum. Only thing that I was not sure why I choose "sudo poweroff'. I tried to follow TCP stream, but could not find that command. Instead, there are "z" and "r" commands which are available answer options. I choose "sudo poweroff" only because other guys who passed earlier reported that they choose this answer. Maybe TCL expert guys can explain better./ l0 r! g5 S: a. Z2 k  W5 E

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Same as in forum, A5 non-vrf. I believe no one confirmed that he got VRF version, only rumors going around. During preparation the most accurate and easy to use workbook for me was CCIEMAN non-vrf. It is only my personal opinion, maybe there are better ones. Here just few comments:
  • Lots of interfaces are shutdown - in DC, and merge routers. But dont worry about this. What I usually do is I do "sh ip int br | e una' before starting any IGP on routers, so we can easily see if interfaces are shutdown
  • L2 topology is SW5 <==Port-channel 35 ==> SW3 <==Port-channel 34==> SW4 <==Port-channel 46 ==> SW6. We can see which ports belong to which port-channel in "all questions" window
  • OSPF Process-ID must be 1 everywhere.
  • EIGRP is pre-configured, We must use Named mode only in Jacobs Core. It was not required for HQ and Office on Jacobs.
  • There is a given output for "sh ip route 52.52.52.52" on R50 and R9/R10. To match this, just redistribute connected Loop52 on R52 without any metric, and you will get exact metric, Nothing special. Remember, Named mode on R9-R10, R50-R54
  • MPLS is preconfigured on Jamesons Core, only make sure it is using Loop0 as router-id
  • HSRP timers 10sec and 30sec.
  • Do NOT do DHCP Snooping. I had 1 hour and 30min after finishing all tasks, and spend about 30min for DHCP Snooping part, but could not make it. After enabling it, all pings are unsuccessful from R101, R101 has IP and gateway, but cannot ping anyone, even its gateway. And just removed Snooping and everything worked again. This part is only 2 points, and it is OK to miss...
  • Traffic from DC to Jacobs HQ must enter via R56. Just set metric when doing aggregate on R55. route-map MED permit 10, set metric 1. Then under bgp, aggregate 172.18.0.0 summary-only route-map MED. This makes all other sites to choose R56 as enter point, since R56 is advertising aggregate without any metric (0).
  • Eigrp summary for default route is configured on R58. Just increase its AD to 21, and redistribute BGP (there is default BPG route) into EIGRP.
  • Inter-VRF routing requirement is clear - Jamesons Office imports only DC, all others in full-mesh.
  • VRF imports and exports - adjacent PEs, for example R3 and R4, must export different route-targets and must not import their own and each others exports.2 y2 l7 _# J/ T3 @1 m: g. q7 U1 [/ v

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All the best friends! This journey was a big challenge for me, but it was worth it for sure. ! K3 k( I& ]" X: Q/ Z. ?

0 m5 h' W: ]. Y4 S9 pPlease keep sharing your feedbacks and please keep helping others! ! F2 C8 G( L( b# ]
发表于 2017-3-17 13:18:44 | 显示全部楼层
能不能写中文。虽然英文也能看懂
5# 2017-3-17 13:18:44 回复 收起回复
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发表于 2017-3-28 04:35:43 | 显示全部楼层
我总觉得新diag的TCL里选power off是有问题的,不能看看那个TCL脚本的内容再选么?尽管那只是1分但也是分啊。
8# 2017-3-28 04:35:43 回复 收起回复
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