# LSA MAX age timer

**URL:** <https://forum.networklessons.com/t/lsa-max-age-timer/3931>\
**Category:** OSPF\
**Created:** [May 22, 2018, 3:25am UTC](https://forum.networklessons.com/t/lsa-max-age-timer/3931 "2018-05-22T03:25:59Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ajay.pachpande](https://cdn-forum.networklessons.com/letter_avatar_proxy/v4/letter/a/a9a28c/32.png) [@ajay.pachpande](https://forum.networklessons.com/u/ajay.pachpande)\
**Post date:** [May 22, 2018, 3:25am UTC](https://forum.networklessons.com/t/lsa-max-age-timer/3931/1 "2018-05-22T03:25:59Z")

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By default, each OSPF LSA is only valid for 30 minutes. but when I have checked into real scenario I found  
it shows 2040 sec which is 34 min.

Can we set LSA validity or its something else which took extra 4 min ?

```
Link ID ADV Router Age Seq# Checksum Link count
10.255.255.13 10.255.255.13 2039 0x8000B122 0x00E329 2
10.255.255.13 10.255.255.13 1 0x8000B123 0x00E12A 2

```

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<div class="post-metadata">

**Author:** ![ReneMolenaar](https://cdn-forum.networklessons.com/user_avatar/forum.networklessons.com/renemolenaar/32/488_2.png) [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\
**Post date:** [May 25, 2018, 11:23am UTC](https://forum.networklessons.com/t/lsa-max-age-timer/3931/2 "2018-05-25T11:23:58Z")

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Hi Ajay,

The max age of an LSA is 60 minutes so that’s why you still see the LSA in the LSDB. The refresh time (by default) is 30 minutes so for some reason, it seems your neighbor didn’t refresh this LSA.

Rene