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long wait for 79xx phones to boot

bphelps
Level 2
Level 2

It sometimes takes 6 or 7 minutes for the phones to load. This seems to occur only when the phone is unplugged and then plugged in again. I see the "getting ip" screen for about five minutes. I'm plugging the phone into a 4224 that is running dhcp. Is this simply an unfortunate quality of dhcp on the 4224, or something else? Has anyone else seen this? What up?

Here are some pertinent configs:

dhcp config:

ip dhcp excluded-address 192.168.2.1 192.168.2.2

ip dhcp excluded-address 192.168.0.1 192.168.0.10

!

ip dhcp pool pc

network 192.168.0.0 255.255.255.0

default-router 192.168.0.1

dns-server 24.25.195.1 24.25.195.3

!

ip dhcp pool phone

network 192.168.2.0 255.255.255.0

option 150 ip 192.168.0.2

default-router 192.168.2.1

dns-server 24.25.195.1 24.25.195.3

Eth switch ports the phones are plugging into:

interface FastEthernet5/1

no ip address

duplex auto

speed auto

switchport access vlan 3

switchport voice vlan 2

snmp trap link-status

!

interface FastEthernet5/2

no ip address

duplex auto

speed auto

switchport access vlan 3

switchport voice vlan 2

snmp trap link-status

VLANs that the phones and pcs are configured for:

interface Vlan 2

description vlan for the phones

ip address 192.168.2.1 255.255.255.0

h323-gateway voip bind srcaddr 192.168.2.1

!

interface Vlan 3

description vlan for the pcs

ip address 192.168.0.1 255.255.255.0

ip nat inside

2 Replies 2

a.wells
Level 1
Level 1

Use PortFast to decrease IP phone boot time

ryan.hicks
Level 1
Level 1

You may want to turn on port fast for ports where the phones are plugged in. This will keep the ports from participating in the stp learning, listening, blocking, etc. stage and go staight to forwarding. This make the phone boot up very fast. This is mention in the IP Telephony design guide as well.