12-17-2006 09:28 PM - edited 03-03-2019 03:04 PM
Currently we have a 2M serial (V.35) link connecting to our providers MPLS cloud via BGP. We are trying to upgrade to 4M and the soln presented to us is a 2 x 2M serial link. I am trying to decide if I should use mlppp and run BGP on it via the multilink interface or use the eBGP multihop load balancing solution. In this latter scenario the BGP peering would be via the loopback addresses and each of the two serial interface would have an ip address each. has anyone set this up before and can advise which option is better or feasible. Is there any thing in particular that one may look out for - to enable or disable the ip route caching maybe one? We also have (Cisco Modular) MQC QOS enabled on the routers serial interface.
Thanks
Vimal.
12-17-2006 10:01 PM
Hi Vimal
I would suggest to go with the second option of running eBGP with multi hop option enabled...
This will also negate the extra load put by MLPP on CPU cycle..
Also do throw more on kinda QOS you have in place in your router..
If possible do post out the config for better clarity on the same..
regds
12-17-2006 10:39 PM
Thanks for your reply. I have not worked out the configs for the new 4M setup yet but am pasting the config for the existing 2M service below. The config is big hence I am just pasting the main QOS portion:
!
class-map match-any QPM_apps
etc..
class-map match-all all-traffic
match any
class-map match-any QPM_video
match protocol rtp video
match access-group name QPM_qos-video
class-map match-any QPM_voice
match protocol rtp audio
class-map match-any QPM_scavenger
match access-group name QPM_scavenger
!
!
policy-map QPM_1
class QPM_voice
priority 348
set ip dscp ef
class QPM_video
bandwidth 460
set ip dscp af31
class QPM_apps
bandwidth 512
random-detect dscp-based
set ip dscp af33
class QPM_scavenger
police 768000 2048000 2048000 conform-action set-dscp-transmit 0 exceed-action drop violate-action
class class-default
fair-queue
random-detect dscp-based
set ip dscp default
policy-map QPM
class QPM_voice
set ip dscp ef
class QPM_video
set ip dscp af41
class QPM_apps
set ip dscp af31
class QPM_scavenger
police 768000 2048000 2048000 conform-action set-dscp-transmit 0 exceed-action drop violate-action
class class-default
set ip dscp default
!
interface FastEthernet0/0
description ## LAN ^V data VLAN ##
ip address xx
ip route-cache flow
duplex auto
speed auto
no clns route-cache
!
interface Serial0/0
bandwidth 2048
ip address xx
max-reserved-bandwidth 90
service-policy input QPM
service-policy output QPM_1
encapsulation ppp
BTW I will implement the config change remotely via telnet.With the eBGP option would I be able to do the changes remotely i.e convert from the existing 1 x serial link to the 2 x 2 eBGP multihop option whilst maintaining telnet connectivity. I think I should be able to since since the existing point-to-point serial interface would retain its ip address even though the BGP peering would be via the loopback addresses in the new setup.
12-17-2006 11:49 PM
Hi Vimal
The QOS configs which you have posted out here is having local significance and i don't think you will be able to get end to end priority or bandwidth guarantee.
It also depends on the SP with which you are having the connectivity.
I don't think in internet cloud the SPs will have some kinda QOS in their Gateway routers or so and its impossible to have some kinda QOS policy agreements with the peering partners too..
If you have delay/latency sensitive traffic in your network better to look after for a separate different mode of connectivity and keep this Internet Leased Line intact..
regds
12-18-2006 12:17 AM
Thanks Edwin. I forgot to mention that this link is part of a global private mpls network via the SP's MPLS cloud hence QOS guarantee is actually in operation.
We do have voip, video traffic. I will try to find out some more on QOS under the mlppp and eBGP scenarios and then perhaps make a choice.
Vimal.
12-18-2006 01:04 AM
Hi Vimal
If you are having Managed VPN services availed from your SP then no need to worry about End to End qos since it will be well taken care at the SP (PE) end..
regds
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