The Cisco ISR4351 router is designed to fill the gap between the Cisco 3900 series routers and Cisco ASR routers. It offers up to 400 Mbps of bandwidth in a 2RU form factor. The Cisco ISR4351 is suggested for migrations from Cisco 2951 routers. It has an 8-core CPU with dedicated processing cores and support for up to 16GB of memory. The Cisco ISR4351 is recommended for networks requiring bandwidth between 200-400 Mbps.

1. CISCO ISR4351 Router
Device | www.netprotocolxpert.in

2.  The cisco 4351 is very robust router and fills the
gap between the Cisco 3900 series router and
Cisco ASR routers.
 We faces various issues like we have the required
WAN bandwidth more than 150 Mbps or 200
Mbps which cisco model we going to take, we are
confused with the Cisco 3900 series
here, although Cisco 3900 series is capable of
handling this much of traffic but still we want
something which can further capable of increasing
the bandwidth till 400 Mbps.

3.  There are lots of demand coming from the Enterprise
customers where the traffic increases day by day and
due to the lack of the cisco WAN router model
enterprise solutions are going away from Cisco.
 Cisco thought and come up with the new series model
which is Cisco ISR 4300 and Cisco ISR 4400 Series
router as they both are under Cisco 4000 Series family
group.
 There are other models as well in Cisco portfolio for this
much of the bandwidth like if you are talking about the
another cisco model named Cisco 4451-X, it can go till
1 Gbps of WAN bandwidth and can solve the gap
between the 400 Mbps till 1 Gbps. So you can increase
the bandwidth and also choose the cisco router model
as per the need of the WAN bandwidth.

4.  We have various recommendations like we can summarise some of
them in the below description, although we can have the more
bandwidth supported in these router but we recommended this
much of the bandwidth for these below routers as:
 From 2 Mbps to 20 Mbps : You can use Cisco 1900 Series router
 From 21 Mbps to 80 Mbps : You can use Cisco 2900 Series router
 From 80 Mbps till 150 Mbps : You can use Cisco 3900 Series router
 From 200 Mbps till 400 Mbps : Cisco 4351 router is good to go
 From 400 Mbps till 1 Gbps : Cisco 4451-X router is perfect
 From 1 Gbps to 2.5 Gbps : Cisco ASR 1001 router ( End of sale )
 From 1 Gbps till 20 Gbps Backplane traffic : ASR 1001-X or ASR
1002-X can be used.
 These above are only the recommendations but we can use much
more traffic from these routers as tested in the labs but we are sure
the live environment is something different from the labs.

5.  Now lets discuss about the Cisco 4351 router which is
under the portfolio of Cisco 4000 Series router product.
 The Cisco 4351 is suggested for migration from existing
Cisco 2951 routers. It offers 200-Mbps performance
(100Mbps port speed),upgradable to 400 Mbps
(200Mbps port speed), in a 2RU form factor with 3 NIM
slots and 2 SM slots.
● 8-core CPU with 4 data-plane cores, 1 control-plane
core, and 3 cores dedicated for services
● Single or double-wide Cisco UCS E-Series support, and
up to 16-GB control and services memory.

7.  Cisco ISR 4300 Series IOS XE Universal –
SISR4300UK9-313S or SISR4300NPEK9-313S
(ISR4351/K9 only)
 Cisco ISR 4351 AX Bundle with APP and SEC
license
 2 single- or 1 double-wide – 1-port clear-channel
T3/E3 service module used focused for T3/E3.
The Maximum Number of T3/E3 Modules
Supported are 2.
 10 (4 10/100/1000 built into chassis) (Ethernet
Routed-Port) and additional 48 if SM-X Layer 2/3
EtherSwitch Service Module used.

8.  Multiple VPN will enable the CPE to be VLAN
aware and support Customer VLAN Tagging
(802.1q) and as such enable mapping between
VLANs to VPNs. The only rule is that a VPN can
map to many VLANs but a VLAN can only map to
a single VPN (this is done to maintain supremacy
of VPNs within the IP Connect Global network).
 The recommendations provided above are based
on testing performed using 400 byte data packets
and 60 byte voice packets. Higher throughput
may be achievable if customers are using larger
packets
 9 (3 10/100/1000 built into chassis) (Ethernet
Routed-Port) and 50 if SM-X Layer 2/3
EtherSwitch Service Module used.

9.  Note : The performance of FL-4350-PERF-K9
13% at 100M down to 2% of port speed at 150M
 The PoE module can be enabled on two of the on
board front-panel Gigabit Ethernet ports. A POE
Module for On Board GE for Cisco ISR 4451-X,
4431 & 4351 is required as a prerequisite.

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