[nemo] draft-cho-nemo-hmra-00.txt
YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@wide.ad.jp> Mon, 01 March 2004 03:14 UTC
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Date: Mon, 01 Mar 2004 11:41:30 +0900
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From: YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@wide.ad.jp>
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Subject: [nemo] draft-cho-nemo-hmra-00.txt
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Hello.
About draft-cho-nemo-hmra-00.txt:
Cited from secion 4.1 Router Advertisement Message Format
----
Figure 2 shows the RA message format with age field.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Code | Checksum |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Cur Hop Limit |M|O| Age |Rsvd | Router Lifetime |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Reachable Time |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Retrans Timer |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Options ...
+-+-+-+-+-+-+-+-+-+-+-+-
----
The "age" is conflicts with the the Home Agent (H) flag
(in <draft-ietf-mobileip-ipv6-24.txt>)
and with the Default Router Preference (prf) flag
(in <draft-ietf-ipv6-router-selection-03.txt>).
The flags is extremely expensive resource and
it is actually running out.
Allocating another "RA option" is better.
Thanks.
--
Hideaki YOSHIFUJI @ USAGI Project <yoshfuji@linux-ipv6.org>
GPG FP: 9022 65EB 1ECF 3AD1 0BDF 80D8 4807 F894 E062 0EEA
- [nemo] draft-cho-nemo-hmra-00.txt YOSHIFUJI Hideaki / 吉藤英明