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Contributor

Using C3850-24T as BGP CE router

Hi everyone,

 I hope you all are doing fine.  

Below is my requirement:

1) Can support BGP, RSTP/STP, OSPF.

2) we will announce only one summary route to Provider

3) We will receive only default route from Provider

4) We have dual ISP for fail over.

5) Each Provider provides 200M  DIA CKT

We have a couple of C3840-24T left over, I am thinking to use them rather than buying new routers.

In our network we use them as ACCESS  SWITCHES, but I am thinking why we can not use that for  CE as it does meet all our requirement. I just want to get you guys feedback.

 

Data center to Branch office:

We have 200 M CKT between Data center and our branch office,  same requirements:

1) OSPF

2) HQOS 

So again  I am thinking to use 3850-24T,   I understand they are usually used for ACCESS layer, but why I can not use it as it does meet the requirement.   Appreciate  any feedback!!

 

Thanks and have a weekend!!

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1 ACCEPTED SOLUTION

Accepted Solutions
VIP Advisor

Re: Using C3850-24T as BGP CE router

Hi

Alright, thank you, it it is WS-C3850-24T-S, it could be upgraded to IP service license in order to be able to use BGP.

 

5 REPLIES 5
VIP Mentor

Re: Using C3850-24T as BGP CE router

Hello,

 

as far as I recall. the 3850 does not support NAT, so if you want to use at as an ISP facing device, that is probably going to be a problem...

Highlighted
Contributor

Re: Using C3850-24T as BGP CE router

Thanks, no , we  down stream  FW will do NAT, 3850  will only be used to get default route from Provider via BGP and announce our IP SPACE via BGP.  

 

 

 

 

VIP Advisor

Re: Using C3850-24T as BGP CE router

Hi

Im not sure the reason to use this switch but take in consideration as Georg mentioned, the NAT is not supported on switches (it can be supported on 6500, 6800 and I think on 9K), now if you want to enable routing you must have a proper license, like showed below:

 

Cisco IOS Software Feature Set Differences

Functions

LAN Base

IP Base

IP Services

Layer 2+

Enterprise access Layer 2

Wide range of Layer 2 access features for enterprise deployments supports Cisco StackPower technology

Complete Access Layer 2

Supports all Cisco Catalyst 2000 and Cisco Catalyst 3000 Layer 2 features, including hot standby protocols

Layer 3

Static IP routing support

Support for SVI

Enterprise access Layer 3

RIP, EIGRP stub, OSPF for routed access, PBR, IPv4 & IPv6 EIGRP stub routing, WCCP, IPV6 uRPF, IPV6 PBR, VRRPv3, Policy Classification Engine, HSRP v6

Complete access Layer 3

OSPF, EIGRP, BGP, IS-IS

VRF-lite

Multicast

IGMP

IPV4 & IPV6 PIM routing

Mobility

Supports Cisco Unified Wireless Networking mobility architecture

Supports Cisco Converged Access mobility architecture with CAPWAP termination at the access

Manageability

Basic manageability

Support for a wide range of MIBs, IPSLA Responder, and RSPAN, PnP, Autoconf, Interface Templates, Secure CDP

Enterprise access Layer 3, Flexible NetFlow for wired and wireless traffic

EEM, GOLD-Lite, and Smart Install Director

Security

Enterprise access security

DHCP Snooping, IPSG, DAI, PACLs, Cisco Identity 4.0, NAC and 802.1x features

Complete access security

Router and VLAN ACLs, private VLANs, complete identity and security; Cisco TrustSec® SXP and IEEE 802.1AE capable in hardware, Device Sensor

QoS

Enterprise access QoS

Ingress policing, Trust Boundary, AutoQoS, and DSCP mapping

Complete access QoS

Support for all Cisco Catalyst 2000 and Cisco Catalyst 3000 QoS features, including per-VLAN policies

Interoperability

Prime 2.1

Identity Services Engine (ISE 1.2/1.3), Mobility Services Engine (MSE 8.0), Improved WebUI

 

My suggestion is verify if that switchport IP Base or IP Services license. Some switche have IP LAN and IP Services license by default. 

 

https://www.cisco.com/c/en/us/products/switches/catalyst-3850-series-switches/models-comparison.html

 

Hope it is useful

:-)

Contributor

Re: Using C3850-24T as BGP CE router

Thanks, It does have IP Base, 

VIP Advisor

Re: Using C3850-24T as BGP CE router

Hi

Alright, thank you, it it is WS-C3850-24T-S, it could be upgraded to IP service license in order to be able to use BGP.

 

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