09-17-2010 04:57 AM - edited 03-17-2019 10:06 PM
I'm planning on implement a solution of VoIP over a 2 parallel WAN links.
Because the bandwidth on both links is less than 512kbps, its important to load balance the traffic between both.
EIGRP its implemented over all the network, so i have the option to use variance to load balance between this links (512kbps and 384kbps)
My second option is tu join both link with MULTILINK.
I want to know which of this options is recomended considering that Data and VoIP will go trought this conection.
Anothe consideration is that i need to implement QoS.
Thanks
Osvaldo U.
Solved! Go to Solution.
09-27-2010 11:13 PM
Hello,
My personal recommendation is to use EIGRP. EIGRP has a feature called Unequal Cost Load Balancing, which basically unequally loads the links between two neighbors based on the link's bandwidth. In the event that one link goes down, EIGRP would immediately redirect all flow over a single link.
Please note that EIGRP is a proprietary routing protocol, so if an ISP is involved between the endpoints, it is unlikely to be supported (look at MLPPP some more) and that with low-bandwidth links, some pretty aggresive QoS settings involving Weighted Random Early Detection (WRED), and Low Latency Queuing (LLQ) will definitely be needed to make the links usable with the lowest amount of jitter as possible.
Something like...
router eigrp
network
network
variance 5
no auto-summary
!
class-map voicestream
match ef
!
policy-map wan512
class voicestream
priority 200
class class-default
fair-queue
random-detect dscp-based
!
policy-map wan384
class voicestream
priority 153
class class-default
fair-queue
random-detect dscp-based
!
interface serial0/0
ip address
service-policy out wan512
max-reserved-bandwidth 90
!
interface serial0/1
ip address
service-policy out wan384
max-reserved-bandwidth 90
!
Ryan
09-27-2010 11:13 PM
Hello,
My personal recommendation is to use EIGRP. EIGRP has a feature called Unequal Cost Load Balancing, which basically unequally loads the links between two neighbors based on the link's bandwidth. In the event that one link goes down, EIGRP would immediately redirect all flow over a single link.
Please note that EIGRP is a proprietary routing protocol, so if an ISP is involved between the endpoints, it is unlikely to be supported (look at MLPPP some more) and that with low-bandwidth links, some pretty aggresive QoS settings involving Weighted Random Early Detection (WRED), and Low Latency Queuing (LLQ) will definitely be needed to make the links usable with the lowest amount of jitter as possible.
Something like...
router eigrp
network
network
variance 5
no auto-summary
!
class-map voicestream
match ef
!
policy-map wan512
class voicestream
priority 200
class class-default
fair-queue
random-detect dscp-based
!
policy-map wan384
class voicestream
priority 153
class class-default
fair-queue
random-detect dscp-based
!
interface serial0/0
ip address
service-policy out wan512
max-reserved-bandwidth 90
!
interface serial0/1
ip address
service-policy out wan384
max-reserved-bandwidth 90
!
Ryan
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide