Christos D.

I am a network engineer who has been involved in the IT industry for more than 13 years. Being involved in enterprise/medium business and government clients I had the experience to work across different geographically locations and time zones to deliver medium to large scale projects. I have vast experience in Cisco network design, implementation, administration and troubleshooting, including below technologies and skills: -- Routing/Switching : more than 13 years exp. I\\\'m currently certified as CCIE -- Security : more than 13 years exp. I\\\'m currently certified as CCSP. -- Voice/IP Telephony : more that 6 years exp. I\\\'m currently certified as CCVP. -- Wireless : more than 4 years exp. -- NMS : more that 10 years exp. -- DataCenter : 2 years exp. -- System administration : more than 13 years exp. administrating Microsoft, Linux, FreeBSD and Solaris Servers. In detail, in my career so far, my deliverables including: -- Routing: Cisco 800-7200VXR/7600/ASR-1000/9000 routers, and technologies including: Cisco IOS/IOS-XE/IOS-XR, Static Routing, RIP, IGRP, EIGRP, OSPF, BGP, PBR, PFR/ODR, IPv6 (RIPng, OSPFv3, BGP), Multicast, VRF, MPLS (MPBGP, L2VPN, L3VPN, TE), WAN protocols (X.25, ISDN, ADSL, PPP, Frame-Relay, ATM), Tunneling (GRE, L2TP, IPv6) and Bridging (CRB, IRB). -- Switching: Cisco Catalyst switches from series 2900 to 6500 and technologies including: Cisco CatOS and IOS, STP/RSTP+/MST, VTP, VLANs, Trunking, Port bonding (LACP, PAGP), Multicast, Stacking (VSS, StakWise) and High Avaliability (HSRP,VRRP,GLBP). -- Security: Cisco firewalls(Routers,PIX,ASA,FWSM,ASASM), Checkpoint Firewalls (up to R74), Open-Source Firewalls (ipfilter,ipfw,pf,iptables), VPN endpoints (VPN3000, ASA, Cisco VPN Client, Anyconnect), IDS/IPS (ASA-IPS,NM-CIDS,IPS4200/4300,IDSM), Host-IPS (CSA), AAA(Cisco ACS up to v5.3 and ISE), Monitoring (CSMARS), and technologies including: Cisco IOS Firewalls (ACL,CBAC,ZBF,NBAR), Cisco ASA/PIX/FWSM OS, VPN (site-to-site, IPSec, ezVPN, VPDN, SSL/WebVPN, DMVPN, GETVPN) , AAA (Radius,TACACS), IOS IDS/IPS, Cisco IDS/IPS sensors (4200/4300/IDSM/NM-CIDS), Cryptography/PKI/CA/Certificates/Token integration, Network Access (802.1x, PVLANs, Port-security, MAC-filtering/MAB, MacSec), Cisco WSA (Ironport). -- Voice/IP Telephony: Cisco CallManager and CallManager Express (up to v8.6), Unity/Unity Connection/Express (up to v8.6), Cisco CRS and Contact Center Express (up to v8.6) , Cisco Presence (up to v8.6), IP-Phones (Cisco CP-7900, SPA and CUPC) , Voice Gateways (ISR, ISR2, AS5300/5400) and technologies including: ISDN (PRI/BRI), FXS/FXO Ports, H323, SIP, MGCP, SRST, CTI, Mobility, QoS (Layer-2&3, LLQ, CBWFQ, RSVP), Video integration, Transcoding, Conference, call queuing using scripts, Voicemail integration, Call Center Integration. -- Wireless: Cisco controllers, Cisco Access Points and Bridges, WCS (up to v7.0), and technologies including: LWAPP, wireless AAA (ACS and ISE integration). -- NMS: Cisco LMS (up to v4.2) , MRTG and CACTI, and technologies including: Syslog, SNMP, NetFlow and SLA provisioning. -- Datacenter technologies: Cisco Nexus 5000/7000 switches, Cisco Content switching (CSS/ACE), Cisco UCS, and technologies including : NX-OS, vPC, vDC Virtualization (Nexus 1000V, and VCenter). -- System administration : Microsoft windows servers (NT/2000/2003/2008), Linux servers (redhat ES/suse/debian/slackware), FreeBSD servers, Solaris servers (up to v10) and technologies including: Directories (Microsoft AD, OpenLDAP), Web services (Microsoft IIS,Apache, NGINX, Microsoft ISA, Squid), DNS (Microsoft, Bind), Mail Services (Microsoft MAPI/Exchange, postfix, sendmail, qmail, courier-imap, ), Databases (MS-SQL, MySQL, PostreSQL), Shell Scripting (csh,sh,bash,awk,perl), Programming languages (C/C++,C#,PHP), Network File services (Microsoft CIFS/SMB, Sun NFS, RSYNC, FTP). Add Certification