CCIE R&S v5 Exam Review on 22 July 2015
TK1. No ticket
TK2. R17 need default route, and verification is R11 need to telnet R17’s Serial interface ip
TK3. Remove max-metric in R5
TK4. Add metric weight 0 1 1 1 1 1 for R11~R14, but the R12 have bandwidth 1000, I didn’t remove it ,
I just modify it to match the original interface bandwidth (10000)
TK5. Just 220.127.116.11 was not working, then i found that the R21 have route-map , once match ip prefix-list 18.104.22.168/8 then set LP 101, so i just add a prefix 22.214.171.124/24 before 126.96.36.199/8
TK6. Wrong next hop address on R25 route-map
TK7. nhrp issue at R18 & R19 , sorry about that , i don’t remember the detail , but there is no special point
TK8. The requirement is R7 is HQ first choice for outbound traffic then second is R8, but actually it didn’t say spork need do that either.
R7 didn’t set 0/0.125 nat outside, add neighbor 188.8.131.52 default-originate,
R8 didn’t set 0/0.123 nat inside, and add default-information originate subnet metric ’20’ , because the R17 have default-information originate subnet metric ’10’, add neighbor 184.108.40.206 default-originate route-map MED, this route-map is add ebgp metric bigger than R3 , that is original
TK9. R24 NAT-T problem
TK10. modify the nat command in R23, from ‘ip nat outside source ….’ to ‘ip nat inside source …’
Finished in 2 hours
D1. I got the log & information , the SW1&SW2 is vtp server role, SW3&SW4 is vtp client role. the message appear that md5 code and vtp revision is the same in SW1&SW2&SW4, only SW3 is difference.
Q1. which device information let you know something wrong? Ans: SW3
Q2. which command can help you to identify the problem? Ans: show vtp status
Q3. which device need to correct? Ans: SW3
Q4. which information you will request to solve the problem Ans:show vtp password
D2. DMVPN mid chain problem, R15 is hub, R17&R18&R19 is Spork. R16 didn’t join dmvpn domain, but R16 &R15 is IGP neighbor, the ip address information EXAMPLE is bellow:
Device/NBMA ip tunnel ip
R15/ X.X.X.8/30 Y.Y.Y.1/24
R16/ X.X.X.14/29 n/a
R17/ X.X.X.9/30 Y.Y.Y.17/24
R18/ X.X.X.10/30 Y.Y.Y.18/24
R19/ X.X.X.11/30 Y.Y.Y.19/24
so, the R16 netmask is cover R15, then R15 will learning the prefix that is cover the nbma ip address.
Q1. which device need to correct? Ans:R16
Q2. what the problem in this device? Ans:increase netmask
D3. uRPF problem, it’s really killer, when i finished D1&D2, i had 15 mins left, but the information really really too much, i think i need more then 30 mins to read
When i finished diag uRPF section , I really very panic and lose my mind, because i knew that , i will failed in this section.
but lunch time, i rebuild my confidence and complete the config section. Thank goodness , I didn’t give up in the middle.
this story tell us , if you really have no time to resolve uRPF problem, you still have chance to complete that, never give up.
Finally , I would like to thanks cciereallabworkbook.