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  • 8/10/2019 3 Strategies for an IP Core Network Refresh _ TechZine _ Alcatel-Lucent

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    T e c h n o l o g y

    3 S t r a t e g i e s f o r a n I P C o r e N e t w o r k

    R e f r e s h

    B Y : B E N T A N G H T T P : / / W W W 2 . A L C A T E L - L U C E N T . C O M / T E C H Z I N E / A U T H O R / B E N - T A N G / ) A N D

    E N R I Q U E H E R N A N D E Z - V A L E N C I A H T T P : / / W W W 2 . A L C A T E L -

    L U C E N T . C O M / T E C H Z I N E / A U T H O R / E N R I Q U E - H E R N A N D E Z V A L E N C I A / ) | M A R C H 1 4 , 2 0 1 4 | A R T I C L E S

    H T T P : / / W W W 2 . A L C A T E L - L U C E N T . C O M / T E C H Z I N E / C A T E G O R Y / A R T I C L E S / ), T E C H N O L O G Y

    H T T P : / / W W W 2 . A L C A T E L - L U C E N T . C O M / T E C H Z I N E / C A T E G O R Y / T E C H N O L O G Y / )

    H I G H L I G H T S

    L e g a c y I P c o r e n e t w o r k s m u s t e v o l v e t o m e e t e v o l v i n g c a p a c i t y d e m a n d s

    T r a f f i c g r o w t h , 1 0 0 / 4 0 0 G t e c h n o l o g y , a n d e q u i p m e n t o b s o l e s c e d r i v e I P c o r e

    e v o l u t i o n

    A d e t a i l e d m e t h o d o l o g y h e l p s s e r v i c e p r o v i d e r s e v a l u a t e t r a n s f o r m a t i o n o p t i o n s

    C U T C O S T S W I T H A N I P C O R E N E T W O R K R E F R E S H

    http://www2.alcatel-lucent.com/techzine/category/technology/http://www2.alcatel-lucent.com/techzine/category/articles/http://www2.alcatel-lucent.com/techzine/author/enrique-hernandezvalencia/http://www2.alcatel-lucent.com/techzine/author/ben-tang/http://www.aboutcookies.org/http://www.alcatel-lucent.com/cookie-policyhttp://www.alcatel-lucent.com/cookie-policy
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    N e x t - g e n e r a t i o n c o r e r o u t i n g p l a t f o r m s g i v e s e r v i c e p r o v i d e r s n e w o p p o r t u n i t i e s t o r e t h i n k

    a n d r e f r e s h I P c o r e n e t w o r k s . T h e s e p l a t f o r m s t a k e a d v a n t a g e o f r e c e n t b r e a k t h r o u g h s i n

    1 0 0 G i g a b i t E t h e r n e t ( G b E ) I P t r a n s p o r t a n d 4 0 0 G b / s n e t w o r k p r o c e s s o r s

    . A s a r e s u l t ,

    t h e y a l l o w s e r v i c e p r o v i d e r s t o m o v e t o h i g h e r c a p a c i t i e s a n d m o r e c o s t - e f f e c t i v e n e t w o r k

    a r c h i t e c t u r e s .

    A r e c e n t B e l l L a b s s t u d y w i t h a T i e r 1 E u r o p e a n s e r v i c e p r o v i d e r h i g h l i g h t e d t h e k e y r o l e t h a t

    a n e x t - g e n c o r e r o u t i n g p l a t f o r m p l a y s i n a n I P c o r e n e t w o r k f r e s h . T h e s e r v i c e p r o v i d e r w a s

    o p e r a t i n g a m u l t i - t i e r , d u a l - p l a n e I P c o r e n e t w o r k w i t h m o r e t h a n 1 0 0 n o d e s i t e s a n d f a c e d 3

    m a i n c h a l l e n g e s :

    I P c o r e n e t w o r k l i n k s a n d n o d e c a p a c i t i e s w e r e u n d e r u t i l i z e d .

    T h e I P c o r e n e t w o r k w a s e x p e n s i v e t o o p e r a t e .

    U p c o m i n g d e r e g u l a t i o n o f I P p e e r i n g p o i n t s w o u l d m a s s i v e l y i n c r e a s e t r a f f i c v o l u m e s a n d

    c h a n g e t r a f f i c p a t t e r n s t h r o u g h t h e I P c o r e .

    T o d e a l w i t h t h e s e c h a l l e n g e s a n d w o r k t o w a r d c o s t - c u t t i n g g o a l s , t h e s e r v i c e p r o v i d e r a s k e d

    B e l l L a b s t o h e l p t h e m i d e n t i f y s t r a t e g i e s f o r c a p a c i t y a n d c o s t i m p r o v e m e n t s . A f t e r d e t a i l e d

    a n a l y s i s , t h e j o i n t t e a m r e c o m m e n d e d 3 s t r a t e g i e s :

    I n c r e a s e l i n k u t i l i z a t i o n t a r g e t s t o r e c o v e r s t r a n d e d c a p a c i t y .

    R e d u c e t h e n u m b e r o f I P b a c k b o n e n o d e s t o o p t i m i z e a n d s i m p l i f y t h e I P c o r e

    a r c h i t e c t u r e .

    A d o p t a n e x t - g e n e r a t i o n c o r e r o u t i n g p l a t f o r m f o r m o r e s c a l a b l e a n d c o s t - e f f e c t i v e

    t r a n s p o r t .

    S t r a t e g y 1 : I n c r e a s e l i n k u t i l i z a t i o n

    I n c r e a s i n g l i n k u t i l i z a t i o n t a r g e t s w i l l h e l p t h e s e r v i c e p r o v i d e r r u n h o t t e r n e t w o r k s a n d s a v e

    t r a n s p o r t c o s t s w i t h o n l y m a r g i n a l i m p a c t o n q u a l i t y o f s e r v i c e ( Q o S ) f o r b e s t - e f f o r t ( B E )

    t r a f f i c ( F i g u r e 1 ) . P r e m i u m t r a f f i c i s p r o t e c t e d a n d u n a f f e c t e d . T h e s t u d y f o u n d t h a t t h e

    s e r v i c e p r o v i d e r c o u l d i n c r e a s e o v e r a l l l i n k u t i l i z a t i o n t a r g e t s :

    F r o m 5 0 % t o 6 7 % t o s a v e 2 3 % i n t r a n s p o r t c o s t s w i t h 1 2 % o f b e s t e f f o r t t r a f f i c a f f e c t e d .

    F r o m 5 0 % t o 8 0 % t o s a v e 3 0 % i n t r a n s p o r t c o s t s w i t h 1 8 % o f b e s t e f f o r t t r a f f i c a f f e c t e d .

    [1

    (http://www2.alcatel-lucent.com/techzine/3-strategies-ip-core-network-refresh/#3-strategies-ip-core-network-refresh-n-1)]

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    (http://www2.alcatel-lucent.com/techzine/wp-content/uploads/2014/03/NP2014014116_fig012.jpg)

    S t r a t e g y 2 : R e d u c e n o d e s i n t h e I P c o r e

    R e d u c i n g t h e n u m b e r o f I P b a c k b o n e n o d e s i n t h e I P c o r e w i l l h e l p t h e s e r v i c e p r o v i d e r s a v e

    o n c a p i t a l e x p e n d i t u r e s ( C A P E X ) . I t w i l l a l s o h e l p t o s a v e o n s p a c e a n d p o w e r c o s t s

    ( h t t p : / / w w w 2 . a l c a t e l - l u c e n t . c o m / t e c h z i n e / w h y - h o t t e r - n e t w o r k s - n e e d - a - c o o l e r - c o r e / ) w h i l e

    m e e t i n g s e r v i c e a v a i l a b i l i t y t a r g e t s ( F i g u r e 2 ) . T h e s t u d y f o u n d t h a t r e d u c i n g t h e n u m b e r o f I P

    b a c k b o n e n o d e s f r o m m o r e t h a n 1 0 0 t o 4 0 w o u l d a l l o w t h e s e r v i c e p r o v i d e r t o :

    S a v e 2 3 % i n r o u t e r C A P E X o v e r 5 y e a r s

    S a v e 4 8 % i n r o u t e r s p a c e a n d p o w e r c o s t s o v e r 5 y e a r s

    Source: Bell Labs Figure 1. Increasing link utilization cuts transport costs

    http://www2.alcatel-lucent.com/techzine/why-hotter-networks-need-a-cooler-core/http://www2.alcatel-lucent.com/techzine/wp-content/uploads/2014/03/NP2014014116_fig012.jpg
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    (http://www2.alcatel-lucent.com/techzine/wp-content/uploads/2014/03/NP2014014116_fig021.jpg)

    S t r a t e g y 3 : A d o p t a n e x t - g e n c o r e r o u t i n g p l a t f o r m

    A d o p t i n g t h e A l c a t e l - L u c e n t 7 9 5 0 E x t e n s i b l e R o u t i n g S y s t e m ( X R S ) ( h t t p : / / w w w . a l c a t e l -

    l u c e n t . c o m / p r o d u c t s / 7 9 5 0 - e x t e n s i b l e - r o u t i n g - s y s t e m ) , w h i c h i s a n e x t - g e n e r a t i o n c o r e

    r o u t i n g p l a t f o r m , w i l l g i v e t h e s e r v i c e p r o v i d e r m o r e s c a l a b l e a n d e f f i c i e n t t r a n s p o r t . T h e

    s t u d y f o u n d t h a t t h e f a s t e r t h e s e r v i c e p r o v i d e r m o v e s t o t h e n e w p l a t f o r m , t h e l o w e r t h e

    t o t a l c o s t o f o w n e r s h i p ( T C O ) o v e r t h e l o n g - t e r m ( F i g u r e 3 ) . T h e n e w r o u t i n g p l a t f o r m r e q u i r e s

    o n l y a s i n g l e c h a s s i s a t m o s t I P c o r e n o d e s i t e s a c r o s s t h e f i v e y e a r s s t u d y p e r i o d , a s o p p o s e d

    t o h a v i n g t o k e e p a d d i n g n e w c h a s s i s i n t h e c a s e o f l e g a c y r o u t e r , r e s u l t i n g i n f a r l e s s

    d e p l o y m e n t c h u r n a n d m a i n t e n a n c e c o s t d o w n t h e r o a d .

    Figure 2. Reducing IP backbone nodes cuts CAPEX, space and power costs

    http://www.alcatel-lucent.com/products/7950-extensible-routing-systemhttp://www2.alcatel-lucent.com/techzine/wp-content/uploads/2014/03/NP2014014116_fig021.jpg
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    (http://www2.alcatel-lucent.com/techzine/wp-content/uploads/2014/03/NP2014014116_fig031.jpg)

    M o v i n g i m m e d i a t e l y t o n e x t g e n e r a t i o n I P c o r e n o d e s w i t h h i g h e r c a p a c i t y , p o r t d e n s i t y a n d

    p e r f o r m a n c e , a l o n g w i t h a s m a l l e r f o o t p r i n t , w o u l d a l l o w t h e s e r v i c e p r o v i d e r t o :

    S a v e 3 7 % i n T C O o v e r 5 y e a r s ( F M O 2 i n F i g u r e 3 ) c o m p a r e d t o t h e 3 0 % s a v e d b y m o v i n g

    g r a d u a l l y t o t h e n e x t - g e n c o r e r o u t i n g p l a t f o r m ( F M O 1 i n F i g u r e 3 ) .

    S a v e 6 0 % i n s p a c e a n d p o w e r c o s t s ( b o t h F M O 1 a n d F M O 2 i n F i g u r e 4 ) .

    Figure 3. Faster router replacement reduces TCO

    http://www2.alcatel-lucent.com/techzine/wp-content/uploads/2014/03/NP2014014116_fig031.jpg
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    (http://www2.alcatel-lucent.com/techzine/wp-content/uploads/2014/03/NP2014014116_fig041.jpg)

    Figure 4. A next-gen core routing platform reduces power costs

    http://www2.alcatel-lucent.com/techzine/wp-content/uploads/2014/03/NP2014014116_fig041.jpg
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    . B e l l L a b s

    p r e d i c t s t h a t I n t e r n e t v i d e o c o n s u m p t i o n ( h t t p : / / w w w 2 . a l c a t e l - l u c e n t . c o m / t e c h z i n e / w h y -

    y o u - n e e d - t o - t a k e - v i d e o - t o - t h e - e d g e / ) a l o n e w i l l g r o w m o r e t h a n 6 t i m e s b y 2 0 1 7 .

    C o r e n e t w o r k a r c h i t e c t u r e s a r e n o t d e s i g n e d f o r e m e r g i n g s e r v i c e s r e q u i r e m e n t s . O l d e r

    1 0 G t e c h n o l o g y a n d l o w e r c a p a c i t y p l a t f o r m s a r e n o t o p t i m i z e d f o r t h e t r a f f i c p a t t e r n s o f

    c l o u d a n d h i g h l y d i s t r i b u t e d a p p l i c a t i o n s .

    T h e r e i s t o o m u c h s t r a n d e d c a p a c i t y . P a s t n e t w o r k u p g r a d e s , e c o n o m i c c o n s t r a i n t s a n d

    a d - h o c n e t w o r k e n g i n e e r i n g m e a n t r a f f i c r o u t i n g i s n o t o p t i m a l .

    N e t w o r k e q u i p m e n t i s a p p r o a c h i n g e n d - o f - l i f e . L e g a c y e q u i p m e n t o f t e n s u f f e r s f r o m

    i n e f f i c i e n t c a p a c i t y e x p a n s i o n , p o w e r c o n s u m p t i o n a n d s p a r i n g . A l a c k o f d a t a o r c o n t r o l

    p l a n e s c a l i n g m e a n s f u r t h e r i n v e s t m e n t s a r e n o t a n e f f e c t i v e w a y t o c o n t r o l n e t w o r k s

    c o s t s .

    F o r c e d e v e n t s f o r c e a r e t h i n k . N e t w o r k t r a n s f o r m a t i o n a n d c o n s o l i d a t i o n d u e t o

    a c q u i s i t i o n s , m e r g e r s , g o v e r n m e n t p o l i c y o r r e g u l a t o r y c h a n g e s a f f e c t t r a f f i c p a t t e r n s .

    N e t w o r k s n e e d a r e d e s i g n t o s t r e a m l i n e o p e r a t i o n s a n d c o s t s .

    C o m p e t i t i o n i s f i e r c e . S e r v i c e p r o v i d e r s w a n t t o m a k e t h e b e s t p o s s i b l e u s e o f n e t w o r k

    c a p a c i t y a n d t o c o n t i n u o u s l y r e d u c e p e r - b i t t r a n s p o r t c o s t s .

    E V A L U A T E Y O U R I P C O R E E V O L U T I O N

    T h e r e a r e a f e w p r a c t i c a l s t e p s t o e v a l u a t e t h e o p t i o n s f o r a n I P c o r e n e t w o r k r e f r e s h .

    T h r o u g h e n g a g e m e n t s w i t h n e t w o r k p l a n n i n g a n d o p e r a t i o n s t e a m s o f s e v e r a l s e r v i c e

    p r o v i d e r s , B e l l l a b s d e v e l o p e d t h e f o l l o w i n g a p p r o a c h :

    1 . D e t e r m i n e b a s e l i n e t r a f f i c a n d g r o w t h t r e n d s . A n t i c i p a t e f u t u r e t r a f f i c p a t t e r n s a n d

    v o l u m e s f o r b r o a d b a n d , e n t e r p r i s e a n d m o b i l e s e r v i c e s . C o l l e c t e n o u g h m e a s u r e m e n t

    d a t a t o f o r e c a s t t r a f f i c d e m a n d s a n d t o c h a r a c t e r i z e c u r r e n t t r a f f i c d e m a n d s f o r t r a f f i c

    m o d e l i n g p u r p o s e s .

    2 . I n c o r p o r a t e n e w d e s i g n r e q u i r e m e n t s . T h i n k a b o u t f u t u r e t r a f f i c p a t t e r n s a n d v o l u m e s . I n

    s o m e c a s e s , t h a t m a y m e a n a n t i c i p a t i n g g o v e r n m e n t o r r e g u l a t o r y c h a n g e s t h a t w i l l a f f e c t

    t r a f f i c r o u t i n g . T r a f f i c a n a l y s i s m u s t c o n s i d e r t h e s e t y p e s o f c h a l l e n g e s a n d i t m u s t w o r k

    w i t h i n c o m p l e t e t r a f f i c d a t a s e t s t o c r e a t e a l o n g - t e r m t r a f f i c f o r e c a s t .

    3 . E x p l o r e a l l v i a b l e n e t w o r k a r c h i t e c t u r e a n d t r a f f i c r e e n g i n e e r i n g o p t i o n s :

    O p t i m i z i n g t h e e x i s t i n g I P c o r e n e t w o r k d e s i g n t o r e f l e c t c h a n g i n g t r a f f i c p a t t e r n s .

    (http://www2.alcatel-lucent.com/techzine/3-strategies-ip-core-network-refresh/#3-strategies-ip-core-network-refresh-n-2)]

    M E N U

    ( H T T P : / / W W W 2 . A L C A T E L - L U C E N T . C O M / T E C H Z I N E )

    M E N U

    T E C H B L O G ( H T T P : / / W W W 2 . A L C A T E L - L U C E N T . C O M / T E C H Z I N E / C A T E G O R Y / T E C H B L O G )

    L A N G U A G E C O N T A C T ( M A I L T O : T E C H Z I N E . E D I T O R @ A L C A T E L - L U C E N T . C O M )

    S U B S C R I B E ( H T T P : / / R E S O U R C E S . A L C A T E L - L U C E N T . C O M / W E B F O R M / C W F 3 1 8 )

    S E A R C H

    http://www2.alcatel-lucent.com/rss/rss-subscription/en.phphttp://twitter.com/alu_techzinehttp://resources.alcatel-lucent.com/webForm/cwf318mailto:[email protected]://www2.alcatel-lucent.com/techzine/category/techbloghttp://www2.alcatel-lucent.com/techzinehttp://www2.alcatel-lucent.com/techzine/why-you-need-to-take-video-to-the-edge/
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    A d j u s t i n g t r a f f i c e n g i n e e r i n g o b j e c t i v e s t o r e c o v e r s t r a n d e d n e t w o r k c a p a c i t y f r o m t h e

    e x i s t i n g n e t w o r k d e s i g n

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    r e q u i r e d t o :

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