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authorpaul <paul>2004-09-12 05:48:35 +0000
committerpaul <paul>2004-09-12 05:48:35 +0000
commit4fc7085cfa36103b491aec130346f1a632187849 (patch)
treed05ebffd8f518ba368c77c78004152608c76059a /doc/ospfd.texi
parent8d0f15fd1b842eb9ca7b3d116c7b6de63af3c195 (diff)
2004-09-11 Paul Jakma <paul@dishone.st>
* ospfd.texi: OSPF MD5 auth requires stable time.
Diffstat (limited to 'doc/ospfd.texi')
-rw-r--r--doc/ospfd.texi7
1 files changed, 6 insertions, 1 deletions
diff --git a/doc/ospfd.texi b/doc/ospfd.texi
index 594845ca..842dfcf4 100644
--- a/doc/ospfd.texi
+++ b/doc/ospfd.texi
@@ -258,7 +258,12 @@ all OSPF packets are authenticated. @var{AUTH_KEY} has length up to 8 chars.
@deffnx {Interface Command} {no ip ospf message-digest-key} {}
Set OSPF authentication key to a cryptographic password. The cryptographic
algorithm is MD5. KEYID identifies secret key used to create the message
-digest. KEY is the actual message digest key up to 16 chars.
+digest. KEY is the actual message digest key up to 16 chars. Note that OSPF
+MD5 authentication requires that time never go backwards, even across
+resets, if ospfd is to be able to promptly reestabish adjacencies with it's
+neighbours after restarts/reboots. The host should have system time be set
+at boot from an external source (eg battery backed clock, NTP, etc.) if MD5
+authentication is to be expected to work reliably.
@end deffn
@deffn {Interface Command} {ip ospf cost <1-65535>} {}