The default arp timeout on a Cisco is four hours.
On Wed, 28 Jun 2000, Joe Matusiewicz wrote:
]
] At 12:54 PM 6/28/00 +0100, declan mckibben wrote:
]
] >Hi, whenever I make a new nat rule in fw-1 (on the IP440 platform) I
] >have to wait ages for our ISP's cisco 3600 (upstream) to update its arp
] >cache. I don't have access to this and would be beaten badly if i
] >rebooted the router. What is the default interval for this cache to
] >update on the 3600 and is there a way of forcing an arp cache flush?
]
]
]
] I haven't touched a Cisco for a while but from what I remember, arp cache
] updates occur in 20 minutes. The command to clear the arp cache (if you
] have access to the Cisco) is simply:
]
] clear arp-cache
]
]
] -- Joe
]
]
]
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