DI-2621 Router
ISDN
(PRI/BRI)
LLC2
SDLC
DLSW-SSP
VLAN
Network layer protocol
ARP
ARP
Proxy
DNS
NAT
IP
Filtering
ICMP
IGMP
DHCP
client
NHRP
Routing protocol
Static routing
Policy-based
routing-
RIP v1, v2
OSPF v1, v2
BEIGRP (compatible with Cisco EIGRP)
BGP-4
DDR
IP Multicasting
DVMRP
PIM-DM/SM
Security
AAA
Radius
PAP
CHAP
TACAS+
Firewall ACL
NAT
VPN
L2TP
GRE
IPSec
Quality of Service (QoS)
FIFO
PQ
CQ
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