01-13-2006 06:37 AM - edited 03-03-2019 11:27 AM
Hi all,
I am looking to configure MLPPP to combine my [2] T1 serial interfaces to my ISP.
I have looked a bit on the cisco web site for information on how to do so but to date cannot seem to track down a simple config.
My other problem is that each T1 is a termination point for a site to site VPN tunnel. I believe I can create a MLPPP virtual interface and include both public addresses on that interface. one as the primary and one as the secondary but am not quite sure how to do this as well.
Any links/help would be greatly appreciated.
Best regards,
Mike
01-13-2006 06:48 AM
Hello,
a sample configuration would look like this:
interface Serial0
no ip address
encapsulation ppp
ppp multilink
ppp multilink group 123
interface Serial1
no ip address
encapsulation ppp
ppp multilink
ppp multilink group 123
interface Multilink123
ip address 2.2.2.2 255.255.255.252 secondary
ip address 1.1.1.1 255.255.255.252
ppp multilink
ppp multilink group 123
Be aware however, that the ISP should route both addresses to your router or use secondary addresses as well.
Hope this helps! Please rate helpful posts
Martin
01-13-2006 07:04 AM
Thanks Martin. I just wanted to confirm the configs.
Before config..
interface Serial0/0/0
description
ip address 1.1.1.1 255.255.255.252
ip access-group 101 in
ip verify unicast reverse-path
no ip redirects
no ip unreachables
no ip proxy-arp
ip inspect IDS out
ip nat outside
ip virtual-reassembly
encapsulation ppp
ip route-cache flow
crypto map SDM_CMAP_1
interface Serial0/1/0
description
ip address 2.2.2.2 255.255.255.252
ip access-group 104 in
ip verify unicast reverse-path
no ip redirects
no ip unreachables
no ip proxy-arp
ip nat outside
ip virtual-reassembly
encapsulation ppp
ip route-cache flow
no cdp enable
crypto map SDM_CMAP_2
AFTER MLPPP config ?? - *=Would this command reside on the MLPPP interface or physical ??
interface Serial0/1/0
no ip address
encapsulation ppp
ppp multilink
ppp multilink group 123
ip verify unicast reverse-path *
no ip redirects *
no ip unreachables *
no ip proxy-arp *
ip virtual-reassembly *
ip route-cache flow * [capturing netflow]
interface Serial0/0/0
no ip address
encapsulation ppp
ppp multilink
ppp multilink group 123
ip verify unicast reverse-path *
no ip redirects *
no ip unreachables *
no ip proxy-arp *
ip virtual-reassembly *
ip route-cache flow *
interface Multilink123
ip address 2.2.2.2 255.255.255.252 secondary
ip address 1.1.1.1 255.255.255.252
ppp multilink
ppp multilink group 123
access-group 110 in
ip inspect IDS out
ip nat outside ** would I then be nat'g to the primary? I would assume so...
crypto map SDM_CMAP_1
thanks in advance !!
01-13-2006 06:51 AM
One additional question....
Each of the current interfaces that will be combined has an access-list on them. I am assuming I should combine the access-lists into one and apply it to the multilink interface ?
thanks again !
01-13-2006 06:59 AM
Hello,
the idea of MLPPP is to combine interface resources into one logical interface (int multilink). This logical interface will get IP addresses and other configuration like access-lists.
So in short the answer is yes.
Be careful when merging access-lists because of top-down processing a match will not lead to further checking additional access-list entries.
General approach: more specific statements to the top.
Hope this helps! Please rate all posts.
Martin
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