From: EitaroUEMURA (eitaro@zj9.so-net.ne.jp)
Date: Mon Dec 26 2005 - 13:47:49 GMT-3
Thanks for your reply Scott,
Sorry,
I thought the 0x25 is 25(decimal).
Thanks,
Eitaro
Scott Morris wrote:
> 2001:0141:0001: they all have in common, right? (that's 48 bits right
> there)
>
> Now look at the next chunk in binary:
>
> 1st: 0000 0000 0001 0002
> 2nd: 0000 0000 0010 0101
>
> Mask: 0000 0000 0011 1111 --> An additional 10 bits of 0's for the network.
> 48 bits + 10 bits of things that must stay the same = 58 bits.
>
> Just because we look at it in hex doesn't mean the router isn't thinking in
> binary still! :)
>
> HTH,
>
> Scott
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> EitaroUEMURA
> Sent: Monday, December 26, 2005 7:59 AM
> To: ccielab@groupstudy.com
> Subject: OSPFv3 area range prefix? IEWB 3.0 Lab4 18.3
>
> Hi Group,
>
> Configure router summary
> "ipv6 address 2001:141:1:12::2/64" and "ipv6 address 2001:141:1:25::2/64",
> use "area 1 range 2001:141:1::/58".
>
> Why isn't it a "/59" ?
>
>
> I have tried configuration that is below.
>
> interface Loopback100
> ipv6 address 2001:141:1::1/64
> ipv6 ospf 1 area 1
> !
> interface Loopback101
> ipv6 address 2001:141:1:1::1/64
> ipv6 ospf 1 area 1
> !
> ....Omitted
>
> interface Loopback199
> no ip address
> ipv6 address 2001:141:1:99::1/64
> ipv6 ospf 1 area 1
>
>
> ----------------------------------------------------
> If configuration with "area 1 range 2001:141:1::/63"
>
> The result is "0 to 1" is summarized.
>
> OI 2001:141:1::/63 [110/1]
> via FE80::202:4AFF:FE8C:6438, FastEthernet0/0 OI 2001:141:1:2::1/128
> [110/1]
> via FE80::202:4AFF:FE8C:6438, FastEthernet0/0 OI 2001:141:1:3::1/128
> [110/1] ....Omitted
>
> ----------------------------------------------------
> If configuration with "area 1 range 2001:141:1::/62"
>
> The result is "0 to 3" is summarized.
>
> OI 2001:141:1::/62 [110/1]
> via FE80::202:4AFF:FE8C:6438, FastEthernet0/0 OI 2001:141:1:4::1/128
> [110/1]
> via FE80::202:4AFF:FE8C:6438, FastEthernet0/0 OI 2001:141:1:5::1/128
> [110/1] ....Omitted
>
> ----------------------------------------------------
> If configuration with "area 1 range 2001:141:1::/61"
>
> The result is "0 to 7" is summarized.
>
> OI 2001:141:1::/61 [110/1]
> via FE80::202:4AFF:FE8C:6438, FastEthernet0/0 OI 2001:141:1:8::1/128
> [110/1]
> via FE80::202:4AFF:FE8C:6438, FastEthernet0/0 OI 2001:141:1:9::1/128
> [110/1] ....Omitted
>
> ----------------------------------------------------
> If configuration with "area 1 range 2001:141:1::/60"
>
> The result is "0 to 9" is summarized.
>
> OI 2001:141:1::/60 [110/1]
> via FE80::202:4AFF:FE8C:6438, FastEthernet0/0 OI 2001:141:1:10::1/128
> [110/1]
> via FE80::202:4AFF:FE8C:6438, FastEthernet0/0 OI 2001:141:1:11::1/128
> [110/1]
> via FE80::202:4AFF:FE8C:6438, FastEthernet0/0 ....Omitted
>
> ----------------------------------------------------
> If configuration with "area 1 range 2001:141:1::/59"
>
> The result is "0 to 19" is summarized.
>
> OI 2001:141:1::/59 [110/1]
> via FE80::202:4AFF:FE8C:6438, FastEthernet0/0 OI 2001:141:1:20::1/128
> [110/1]
> via FE80::202:4AFF:FE8C:6438, FastEthernet0/0 OI 2001:141:1:21::1/128
> [110/1]
> via FE80::202:4AFF:FE8C:6438, FastEthernet0/0 ....Omitted
>
> ----------------------------------------------------
> If configuration with "area 1 range 2001:141:1::/58"
>
> The result is "0 to 39" is summarized.
>
> OI 2001:141:1::/58 [110/1]
> via FE80::202:4AFF:FE8C:6438, FastEthernet0/0 OI 2001:141:1:40::1/128
> [110/1]
> via FE80::202:4AFF:FE8C:6438, FastEthernet0/0 OI 2001:141:1:41::1/128
> [110/1]
> via FE80::202:4AFF:FE8C:6438, FastEthernet0/0 ....Omitted
>
>
>
> Thanks in advance,
>
> Eitaro
>
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