Dell S4048T User Manual

C’s configuration. Local-AS allows this behavior to happen by allowing Router B to appear as if it still belongs
to Router B’s old network (AS 200) as far as communicating with Router C is concerned.
Figure 28. Before and After AS Number Migration with Local-AS Enabled
When you complete your migration, and you have reconfigured your network with the new information,
disable this feature.
If you use the “no prepend” option, the Local-AS does not prepend to the updates received from the eBGP
peer. If you do not select “no prepend” (the default), the Local-AS is added to the first AS segment in the AS-
PATH. If an inbound route-map is used to prepend the as-path to the update from the peer, the Local-AS is
added first. For example, consider the topology described in the previous illustration. If Router B has an
inbound route-map applied on Router C to prepend "65001 65002" to the as-path, the following events take
place on Router B:
1 Receive and validate the update.
2 Prepend local-as 200 to as-path.
Border Gateway Protocol IPv4 (BGPv4) 223

Dell S4048T Specifications

General

Switching Capacity	1.44 Tbps
Rack Units	1U
Form Factor	Rack-mountable
Power Device	Internal power supply
Power Redundancy	Optional
Product Type	Switch
Jumbo Frame Support	Yes
Routing Protocol	OSPF, BGP, RIP, VRRP, PIM-SM, IGMP
Remote Management Protocol	SNMP, RMON, Telnet, SSH
Features	Quality of Service (QoS), Jumbo Frames Support, Virtual Route Redundancy Protocol (VRRP), VLAN support, sFlow, Multiple Spanning Tree Protocol (MSTP), Rapid Spanning Tree Protocol (RSTP), IPv6 support
Compliant Standards	IEEE 802.3, IEEE 802.3u, IEEE 802.3ab, IEEE 802.3ae
Dimensions (W x D x H)	17.3 in x 16 in x 1.7 in
Operating Temperature	0°C to 40 °C
Operating Humidity	10% to 90% (non-condensing)