Vista/XP networking dilemma

As things stand right now:

PC #1 - Windows Vista Business. Firewall disabled. DHCP address from
Linksys wired DSL router.

PC #2 - Windows XP Pro. Firewall disabled. DHCP address from Linksys
wired DSL router.

Both machines are in the same workgroup.

************************************************** **********************************

The XP machine can ping the router, ping the Vista machine by IP
address, access the internet, access file shares on the Vista machine
by ip address (\\address\share). It cannot ping the Vista machine by
name.

The Vista machine can ping the router and access the internet. It
cannot ping the XP machine by name or address (request timed out).


Can anyone help me figure out what's going on?


Vista Ipconfig output:
-------------------------------------
Windows IP Configuration

Host Name . . . . . . . . . . . . : Dell1
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) 82562V-2 10/100
Network Conne
on
Physical Address. . . . . . . . . : 00-1D-09-89-BA-AC
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::ecbc:9c5a:
3015:e77%9(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.103(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Wednesday, March 05, 2008
5:12:13 PM
Lease Expires . . . . . . . . . . : Friday, March 07, 2008 5:12:13
PM
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DHCPv6 IAID . . . . . . . . . . . : 201334025
DNS Servers . . . . . . . . . . . : 192.168.0.1
192.168.0.1
NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter Local Area Connection* 6:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-
Interface
Physical Address. . . . . . . . . : 02-00-54-55-4E-01
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 7:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : isatap.
{BB7B8E03-0CDA-49AD-9E0F-31D64C
04C}
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::5efe:
192.168.1.103%10(Preferred)
Default Gateway . . . . . . . . . :
DNS Servers . . . . . . . . . . . : 192.168.0.1
192.168.0.1
NetBIOS over Tcpip. . . . . . . . : Disabled



Vista "Route Print" output:
---------------------------------------------------------------------

Interface List
9 ...00 1d 09 89 ba ac ...... Intel(R) 82562V-2 10/100 Network
Connection
1 ........................... Software Loopback Interface 1
8 ...02 00 54 55 4e 01 ...... Teredo Tunneling Pseudo-Interface
10 ...00 00 00 00 00 00 00 e0 isatap.
{BB7B8E03-0CDA-49AD-9E0F-31D64CD4004C}
================================================== =========================

IPv4 Route Table
================================================== =========================
Active Routes:
Network Destination Netmask Gateway Interface
Metric
0.0.0.0 0.0.0.0 192.168.1.1
192.168.1.103 20
127.0.0.0 255.0.0.0 On-link
127.0.0.1 306
127.0.0.1 255.255.255.255 On-link
127.0.0.1 306
127.255.255.255 255.255.255.255 On-link
127.0.0.1 306
192.168.1.0 255.255.255.0 On-link
192.168.1.103 276
192.168.1.103 255.255.255.255 On-link
192.168.1.103 276
192.168.1.255 255.255.255.255 On-link
192.168.1.103 276
224.0.0.0 240.0.0.0 On-link
127.0.0.1 306
224.0.0.0 240.0.0.0 On-link
192.168.1.103 276
255.255.255.255 255.255.255.255 On-link
127.0.0.1 306
255.255.255.255 255.255.255.255 On-link
192.168.1.103 276
================================================== =========================
Persistent Routes:
None

IPv6 Route Table
================================================== =========================
Active Routes:
If Metric Network Destination Gateway
1 306 ::1/128 On-link
9 276 fe80::/64 On-link
10 281 fe80::5efe:192.168.1.103/128
On-link
9 276 fe80::ecbc:9c5a:3015:e77/128
On-link
1 306 ff00::/8 On-link
9 276 ff00::/8 On-link
================================================== =========================
Persistent Routes:
None