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Community Member

CE configuration query (routing issue ,NAT , usable block IP's)

Hi all

got BIP connection from ISP, with block of public ip's (100.100.100.1/30)

PE: 80.80.80.1 /30

CE: 80.80.80.2 /30

there is server on the LAN side which I want to be accessed via public IP 100.100.100.2

how can i go about setting this using just 1 box (do not want to involve firewall for NAT , just 1 router - cisco 1841 )

topology and most important config in attachments...

now, PE and CE ip's are  pingabe fine from net

server can be accessed from outside (via telnet for example  no problem)

ISP is advertising routes to 80.80.80.2 and 100.100.100.1/30 via PE (80.80.808.1)

the issue is trace to my public IP (100.100.100.2)...it hits PE then CE ..then goes back to PE then to CE...then again back to PE then CE ..etc....

I think i need to put some route to 100.100.100.1/30 in my config ...is that right ?

please help....

1 REPLY
Community Member

Re: CE configuration query (routing issue ,NAT , usable block IP

Hi

Further to my description of the problem please see how ping and traceroutes looks like:

C:\user>ping 100.100.100.2
Pinging 100.100.100.2 with 32 bytes of data:
Reply from 80.80.80.2: TTL expired in transit.
Reply from 80.80.80.2: TTL expired in transit.
Reply from 80.80.80.2: TTL expired in transit.
Reply from 80.80.80.2: TTL expired in transit.

   
C:\user>tracert 100.100.100.2
Tracing route to [100.100.100.2]
over a maximum of 30 hops:
  1    <1 ms    <1 ms    <1 ms  10.252.240.1
  2    <1 ms    <1 ms    <1 ms  10.252.254.1
..
..
  6    16 ms    16 ms    16 ms  80.80.80.2
  7    17 ms    16 ms    31 ms  80.80.80.1
  8    30 ms    23 ms    25 ms  [80.80.80.2]
  9    23 ms    24 ms    23 ms  80.80.80.1
10    33 ms    57 ms    52 ms   [80.80.80.2]
11    67 ms    35 ms    39 ms  80.80.80.1
12    39 ms    59 ms    70 ms   [80.80.80.2]
13   101 ms    36 ms    44 ms  80.80.80.1
14    58 ms    45 ms    43 ms  [80.80.80.2]
15    51 ms    62 ms   101 ms  80.80.80.1
^C

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