Chun Y. Nam (John)

Mobile: 718-***-****

acpcw9@r.postjobfree.com

www.linkedin.com/in/JohnNamNE

SUMMARY

9+ years of experience in designing, implementing and supporting

various complex network infrastructures.

Successfully completed many complex and high profile projects.

Liaison between different business groups to guarantee alignment

of scope and expectation of projects.

Completed expedited projects without delay and without failure.

Lead support teams in troubleshooting critical network issues.

Provided immediate temporary solutions during major outages.

Investigated and provided permanent fix for difficult issues due

to hardware, software or design faults.

Designed various infrastructures based on specific network

requirements, such as Guest wireless Internet, MS Exchange

dedicated replication circuit, LAB, and DMZ environment,

modified QoS for traffic shaping.

Self starter with can-do attitude to tackle any challenges.

Attention-to-details, making sure all aspects of design,

implement and day to day support issues are covered, including

maintaining documentation updates.

Works well with any support team, with zero complaint track

record.

PROFILE

Proficient with network technologies including:

Routing:RIPv2, EIGRP, OSPF, BGP.

L2 Switching technologies such as Trunking protocols, MST, Rapid

SPT, VTP, LACP, PagP, VLANs, PVLANs, VACLs, SPAN, Port security,

Voice Vlans.

WAN circuit such as HDLC, FrameRelay, Ethernet, POS., LTE

wireless backup circuits,

Other network technologies: VRF, GRE, VSS, VPC, OTV, BFD,

Stackwise, WCCP, 802.11X, QoS, VPNs, Multicast(PIM_SM-DM,

anycast, MSDP, IGMP), FHRP, VRRP, GLBP, NAT and PAT, ACLs,

Proficient in supporting enterprise WAN as well as local LAN

infrastructure.

Hands on experience in configuring and supporting Cisco hardware

including:

Cisco Routers and switches: ASR1002, ISR 2900s, 3900, 2600~3800

series routers, 6524ME switches, 6500s (CAT and IOS), 4500s,

4948s, 3800s, 3700s, 3600s, 3500s and 2900 switches. Cisco Nexus

5548, 5596, and FEX 2248 and 2232s, knowledge of Cisco Fabric

Path, OTV,

Cisco WAVE devices including 594, 694, 7541s and 8541s in both

inline and WCCP redirect modes.

Cisco WLC 5508 and 4402s, WiSMs on 6500s, autonomous and

lightweight AP.

Other devices such as Cisco ASA 5500s, Digi Terminal Servers.

Familiar with cable standards including CAT5E, 6, RS232, LC,

MTRJ, SC single and multimode fibers.

Experienced in system-interoperability, extra-net services,

vendor and carrier circuits. IPSEC VPNs

Hands on Sniffer software and hardware in assisting in

trouble-shooting and benchmarking performances. Utilizing Sniffer

Pro, FLUKE, wireshark.

Proficient with L3 routing protocols including RIPv2, EIGRP,

OSPF, BGP. L2 Switching technologies such as 802.11q, 802.11D,

802.11W, LACP, PagP, VTP, VLANs, PVLANs, WAN circuit such as

HDLC, FrameRelay, Ethernet, POS., LTE wireless backup circuits.

Familiar with NAT/PAT, ACL and work closely with application and

security teams to define and troubleshoot firewall rules.

Familiar with Proxy and Internet connectivity and integration.

Familiar with design documentation creation and updates utilizing

Microsoft Visio. Familiar with VB scripts for task automation.

Basic understanding of Unix and Bourne shell.

EMPLOYMENT

Verizon Business 2008 -

March 2015

Life Cycle Network Engineering

Supported various large global corporate accounts, design and

implement complex networks integrating new hardware and software

technologies. Including Cisco ASR, ISR routers,2600 ~3800

routers, Cisco 7200 with NPE G1and G2 routers. Cisco 6500 and

4500 with VSS setup on core switches, Nexus 5K to 7K layer 2 and

layer 3 switches utilizing VDC, VPC, VRF. Cisco WAVEs, Cisco 5508

and 4402 Wireless controllers with 1200, 1300 and 3500

lightweight Access points, a couple autonomous mode Aps in

Canada, Utilizing 802.11x authentication against Radius servers

and PSK for legacy handheld wireless scanners and wireless

phones.

Installed, maintained, updated and upgraded network equipments

including network documentations utilizing Visio. Lead project

upgrading ios for hundreds of 3XX0 switches from 12.code train to

15.code train. 4500E and X(VSS) core switches to the next to

latest IOS or IOS-XE code train, Nexus 5010 and 5048 switches,

from NX-OS 4.x code to 5.0(3) and up, 4402 and 5508 WLCs from

4.code up to 7.4 codes, WAVE devices from 4.code to 5.3 and up

codes.

Lead projects to refresh hardware platform from legacy 6500 core

routers to modular layered core, distribution, access utilizing

cisco 4500Es, Nexus 5548s with Fex 2248 and 2232s, fiber

distribution layer utilizing Cisco 3750/3850 stacked switches.

Design, Implement and support new branch sites and circuits on

either MPLS or Internet.

Lead project to implement isolated visitor connections on shared

access switches utilizing port security and acls.

Work closely with various support teams to provide design

solutions for various customer requirements based on best

practice industry standards.

Provides 2nd and 3rd level day to day trouble-shooting support

for various issues across enterprise infrastructure. Provide

technical details for root cause analysis for incidents.

Work with Security team in design and implementation of new DMZ,

installation of new MPLS and vendor circuits. Install and

maintain always-on backup LTE circuits. Participated heavily in

the process for datacenter server migration, circuit migration

and infrastructure changes.

Design ip address assignment for new projects, consolidation and

migration of existing address spaces. Lead project to re-ip plant

with hundreds of end devices including servers, routers,

switches, wlcs, wave devices, ups, security devices, voip phones.

Maintain Site to Site IPSEC VPNs on Cisco 3600 VPN router.

Install, maintain and upgrade WAN optimizers utilizing Cisco WAVE

devices in both in-line and wccp redirection mode. Configured

devices include Cisco 594, 694, 8541, 7541 WAN Optimizers.

Install, maintain, upgrade and troubleshoot Wireless

infrastructure utilizing Cisco Wireless controllers. Design and

implement Guest Wireless infrastructure utilizing centralized

anchor controllers.

Lead project in design, implement and support vendor specific

wireless access utilizing anchor controller technology and Palo

Alto firewall combination.

Investigate network abnormalities and advise on corrective

actions based on industry best practice. Analyze reports

generated by fluke netflow to identify network issues. Work

closely with Cisco TAC to resolve issues and follow-up/report

bugs on new software/hardware.

Provided customer with device inventories for capacity planning

and maintenance purposes.

Create and maintain ACLs for QoS policy maps for both LAN ingress

and WAN egress applications. Trouble shoot QoS related WAN and

LAN issues.

Designed new and improved existing routing configuration for

redundant circuits and redundant networks.

Configure, maintain and troubleshoot multicast issues for

building automation devices.

Created VBScipts to automate switchport report generation.

Investigated, discovered and resolved various difficult issues,

for example:

Packet drops due to edge network vendor specifically re-writes

their traffic's dscp bit to be realtime, and got dropped over

circuits with strict real time policing policy.

WCCP tunnel hung due to circuit instability.

Routing loop occurs due to BGP and OSPF redistribution issues.

EDS, New York, NY/ Verizon Business 2006 - 2008

Network operations (for RBS)

Supported day to day network operation for an enterprise

infrastructure. Supported hardware include Cisco 7200VXR routers,

ONS box, Fiber switches and patches for EMC2. Cisco 6000 Cat and

IOS switches and routers. Cisco 3000 VPN concentrator, Cisco 3750

stacked switches an Cisco 3640 terminal emulator.

Assists in migration of Datacenter. Discovered unidirectional

fiber cable fault in dedicated circuit and restores DC to DC

connectivity. Rack, Mount and installed new switches and routers

at new Datacenter and prepped device with new IOS image. Labeled

and patched all connections following Datacenter specific cabling

requirements.

In charge of submitting and implementing request for changes for

new requirements and improvement of services.

Trouble-shoot day to day network related incidents and help

maintain a trouble-free network environment. Patching of various

interconnections between circuits, routers, firewalls, ids,

switches, servers, consoles, workstations, phones, VoIP gateways,

and EMC2 switch to disk.

Consolidated and updated network documentations, including

network drawings and connection database for transition

requirements.

Completed project for EMC2 setup at DR data center including

cable management and documentations.

Supported DR exercises and update DR required routing change

scripts for DNS, SWIFT and various business service database and

application server network failover.

Installed and maintained vendor specific circuits and hardware in

DMZ, including ADP, Bloomberg, Fedline, BONY, Loanet, Tradeweb

and such.

EDS, New York, NY 2003 - 2006

Associate System Analyst (For ABNAMRO)

Support day to day 2nd and 3rd level troubleshooting environment

for various users.

In charge of asset management and other projects involving group

of user migrations, application support and standardization.

Working closely with all other support functions in ensuring user

satisfaction and timely delivery of services.

Discovered application design issue causing internal chat program

not able to communicate over wan links that fragmented packets

larger than 1492 byte. Discovered and resolved issue with

internal multicast application utilizing reliable transport on

layer 7 caused by speed duplex mismatch on developer's

workstations.

Support and troubleshoot developer/dba's network connectivity

issue due to user right, dns or other configuration issues.

ING BARINGS LLC / ABN AMRO, New York, NY 2001-2003

Associate System Analyst

Day to day support of trading floor including OTC, Fixed Income,

Equities and FX desks.

2nd and 3rd level trouble shooting of in house and vendor

applications including various trading systems.

ING Barings LLC / ABN AMRO, New York, NY 1998 - 2001

System Analyst/Associate System Analyst

Day to day support of back office trading support staff,

including DBAs, Application developers and IT executives.

Involved in 2nd and 3rd level troubleshooting of various issues

on both front and back office users.

ING Barings LLC, New York, NY 1998 - 1998

Desktop support

Responsible for day to day support of fixed income trading floor.

EDUCATION

CCNA Certified.

CCNP Certified (Routing and Switching)

ITIL3.0 Foundations

Microsoft MCPS

Windows NT and Windows 2000 OS and security courses

Sniffer Pro

Microsoft System Management Courses

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