Samir,
 Usually this is used when requested for multiple keys and start/stop
periods. Or password/auth changes. Potential use in conjunction with ntp
services. Particular attention to start/stop times as well as zones/etc..

Don

On 4/17/11 12:46 PM, "[email protected]" <[email protected]> wrote:

>Hello Samir,
>
>No it is not necessary to use the send-lifetime option. I never use that
>option unless it is specified.
>
>Sent from my Verizon Wireless Phone
>
>----- Reply message -----
>From: "Samir Idris" <[email protected]>
>Date: Sun, Apr 17, 2011 6:35 am
>Subject: [OSL | CCIE_RS] RIP
>To: <[email protected]>
>
>Hi,
>
>A quick question:
>
>When configuring RIP authentication, is it necessary to specify the send
>and
>accept lifetime?  I think not.  Am I right?
>
>Key-chain R2R4:
>    key 1 -- text "ipexpert_R2toR4"
>        accept lifetime (always valid) - (always valid) [valid now]
>        send lifetime (always valid) - (always valid) [valid now]
>
>
>R2(config-subif)#do sh ip proto
>Routing Protocol is "rip"
>  Outgoing update filter list for all interfaces is not set
>  Incoming update filter list for all interfaces is not set
>  Incoming routes will have 5 added to metric if on list R8
>  Sending updates every 30 seconds, next due in 19 seconds
>  Invalid after 180 seconds, hold down 0, flushed after 240
>  Redistributing: rip
>  Default version control: send version 2, receive version 2
>    Interface             Send  Recv  Triggered RIP  Key-chain
>    FastEthernet0/0       2     2
>    Serial0/1.24          2     2                    R2R4
>    Serial0/1.25          2     2
>    Serial0/1.26          2     2
>  Automatic network summarization is not in effect
>  Maximum path: 4
>  Routing for Networks:
>    0.0.0.0
>  Passive Interface(s):
>    Serial0/0
>    FastEthernet0/1
>    Serial0/1
>    Serial0/2
>    Serial0/3
>    FastEthernet1/0
>    FastEthernet1/1
>    FastEthernet1/2
>    FastEthernet1/3
>    FastEthernet1/4
>    FastEthernet1/5
>    FastEthernet1/6
>    FastEthernet1/7
>    FastEthernet1/8
>    FastEthernet1/9
>    FastEthernet1/10
>    FastEthernet1/11
>  Passive Interface(s):
>    FastEthernet1/12
>    FastEthernet1/13
>    FastEthernet1/14
>    FastEthernet1/15
>    Vlan1
>    VoIP-Null0
>  Routing Information Sources:
>    Gateway         Distance      Last Update
>    150.100.100.6        120      00:00:24
>    150.100.100.5        120      00:00:01
>    150.100.24.4         120      00:01:54
>    150.100.12.1         120      00:00:12
>  Distance: (default is 120)
>
>Apr 17 15:33:49.891: RIP: ignored v2 packet from 150.100.24.4 (invalid
>authentication)
>
>
>_______________________________________________
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>visit www.ipexpert.com

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