Proposal for Maintenance Event for VRRP [RFC-5798]
"Anurag Kothari (ankothar)" <[email protected]> Tue, 19 Feb 2013 22:08:41 +0000
| Newsgroups | gmane.ietf.vrrp |
|---|---|
| Message-ID | <[email protected]> |
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Hi
I want to propose a new Maintenance Event (modification of Shutdown Event) =
for VRRP (RFC-5798] which would allow to gracefully failover the VRRP Maste=
r to Redundant (Backup Router).
Problem Statement:
VRRP preemption is not configured on the redundant / backup router. How to =
initiate VRRP Traffic to failover to the redundant / backup router graceful=
ly without modifying the configuration on the redundant / backup router (i.=
e. adding preemption)
Proposed Solution:
Addition to Section 6.4.3 of RFC-5798:
- If a Maintenance event is received, then:
+ Cancel the Adver_Timer
+ Send an ADVERTISEMENT with Priority =3D 0
-endif // maintenance recv
Unlike Shutdown event the router will not "Transition to the {Initialize} s=
tate" and continue to be Master and forward traffic till the backup router=
sends an ADVERTISEMENT (triggered by receiving an ADVERTISEMENT with Prior=
ity =3D 0) and becomes master.
Here are couple of examples of how a maintenance event may be triggered
1) By some user command e.g. "maintenance-mode" in the vrrp configurat=
ion.
2) By setting the priority =3D 0 for a particular VRID.
Thanks
-Anurag
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<p class=3D"MsoNormal">Hi<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">I want to propose a new Maintenance Event (modificat=
ion of Shutdown Event) for VRRP (RFC-5798] which would allow to gracefully =
failover the VRRP Master to Redundant (Backup Router).<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal"><b>Problem Statement:</b><o:p></o:p></p>
<p class=3D"MsoNormal">VRRP preemption is not configured on the redundant /=
backup router. How to initiate VRRP Traffic to failover to the redundant /=
backup router gracefully without modifying the configuration on the redund=
ant / backup router (i.e. adding preemption)<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal"><b>Proposed Solution:<o:p></o:p></b></p>
<p class=3D"MsoNormal">Addition to Section 6.4.3 of RFC-5798:<o:p></o:p></p=
>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:"Courier New"">=
- If a Maintenance event is received, then:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:"Courier New"">=
<o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:"Courier New"">=
+ Cancel the Adver_Timer<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:"Courier New"">=
<o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:"Courier New"">=
+ Send an ADVERTISEMENT with Priority =3D 0<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:"Courier New"">=
<o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:"Courier New"">=
-endif // maintenance recv<o:p></o:p></span></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">Unlike Shutdown event the router will not “<sp=
an style=3D"font-family:"Courier New"">Transition to the {Initial=
ize} state</span>” and continue to be Master and forward traffic &nbs=
p;till the backup router sends an
<span style=3D"font-family:"Courier New"">ADVERTISEMENT</span> (t=
riggered by receiving an
<span style=3D"font-family:"Courier New"">ADVERTISEMENT</span> wi=
th Priority =3D 0) and becomes master.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">Here are couple of examples of how a maintenance eve=
nt may be triggered<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><![if !supportLists]><span style=3D"mso-list:Ignore">1)<span style=
=3D"font:7.0pt "Times New Roman"">
</span></span><![endif]>By some user command e.g. “maintenance-mode&#=
8221; in the vrrp configuration.<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><![if !supportLists]><span style=3D"mso-list:Ignore">2)<span style=
=3D"font:7.0pt "Times New Roman"">
</span></span><![endif]>By setting the priority =3D 0 for a particular VRID=
.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">Thanks<o:p></o:p></p>
<p class=3D"MsoNormal">-Anurag<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
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