ip options
Dario Ciccarone (dciccaro)
dciccaro at cisco.com
Wed Oct 28 19:17:03 UTC 2009
Luca:
Check
http://www.cisco.com/en/US/docs/ios/sec_data_plane/configuration/guide/s
ec_acl_sel_drop_ps6350_TSD_Products_Configuration_Guide_Chapter.html#wp1
043334
Not the whole story, but :)
Hope it helps,
Dario
> -----Original Message-----
> From: Luca Tosolini [mailto:bit.gossip at chello.nl]
> Sent: Wednesday, October 28, 2009 3:06 PM
> To: nanog
> Subject: ip options
>
> Experts,
> out of the well-known values for ip options:
>
> X at r4# set ip-options ?
> Possible completions:
> <range> Range of values
> [ Open a set of values
> any Any IP option
> loose-source-route Loose source route
> route-record Route record
> router-alert Router alert
> security Security
> stream-id Stream ID
> strict-source-route Strict source route
> timestamp Timestamp
>
> I can only think of:
> - RSVP using router-alert
> - ICMP using route-record, timestamp
>
> But I can not think of any other use of any other IP option.
> Considering the security hazard that they imply, I am
> therefore thinking
> to drop them.
>
> Is any other ip options used by: ospf, isis, bgp, ldp, igmp, pim, bfd?
> Thanks,
> Luca.
>
>
>
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