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Configure Cisco 1721 2 T1's PPP multilink

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ceplon

Technical User
Joined
Jun 28, 2006
Messages
1
Location
US
Greetings. I will be adding a second T1 to our network. I read here ( and other sites that the best way to bond them is using the Multilink PPP.

I just want to make sure my configuration is correct. PLease let me know if there is anything wrong or missing.

Here is the info from my ISP

--> General Circuit Information <--
===================================
PLNI Circuit ID: HI/HCE-/66874//PKFF
Verizon Circuit ID: 82/HCGGS/000685/HAWT
Bandwidth: 1536K
Encapsulation:
Line Coding: B8ZS
Line Framing: ESF
Channels: 24
==================
--> Addressing <--
==================
WAN IP Netblock: 64.75.205.0/30
Gateway/Default route IP Address: 64.75.205.1
Customer WAN IP Address: 64.75.205.2
WAN Subnet Mask: 255.255.255.252

LAN IP Netblock: 64.75.132.128/25

HERE IS MY CONFIG
Code:
Using 758 out of 29688 bytes
!
version 12.2
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
!
ip subnet-zero
!
interface Multilink1
 ip address 64.75.205.2 255.255.255.252
 ppp multilink
 multilink-group 1
!
interface FastEthernet0
 ip address 64.75.132.129 255.255.255.0
 speed auto
!
interface Serial0
 no ip address
 encapsulation ppp
 no fair-queue
 ppp multilink
 multilink-group 1
!
interface Serial1
 no ip address
 encapsulation ppp
 ppp multilink
 multilink-group 1
!
ip classless
ip route 0.0.0.0 0.0.0.0 Multilink1
no ip http server
no ip http secure-server
!
!
!
!
line con 0
 exec-timeout 5 0
line aux 0
line vty 0 4
 password *****
 login
!
no scheduler allocate
!
end
 
Enter the following in global config:

ip cef
service password-encryption

Add to multilink interface:

no cdp enable
ppp multilink fragment disable

I would also enable NTP for correctly dated logging information. Following is an example of pacific time settings that self adjust for daylight savings time:


service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
service sequence-numbers
logging buffered 51200 debugging
clock timezone Pacific -8
clock summer-time Pacific recurring
ntp server xxx.xxx.xxx.xxx


 
BTW....
The correct subnet mask for your ethernet port should be 255.255.255.128
 
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