1. Home
  2. Cisco Systems
  3. local is slower to access ?

local is slower to access ?

My router R2 ( 172.16.2.2 ) connects to router R1 ( 172.16.2.1 ) via serial interface. These two routers are 2610.

When I ping my serial interface ip, it takes longer time to ping the remote router's interface.

What can cause this ?

Below is the output.

Thanks,

DT

R2#sh ip int brie Interface IP-Address OK? Method Status Protocol Ethernet0/0 10.1.0.2 YES NVRAM up up Serial0/0 172.16.2.2 YES manual up up

R2#ping 172.16.2.2

Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 172.16.2.2, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/60 ms R2# R2# R2#ping 172.16.2.1

Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 172.16.2.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 32/32/32 ms R2#

Reply to
dt1649651
Loading thread data ...

Reply to
Edwin.R.Gonzalez

When you ping the local serial address, the packet is actually sent out the serial port, and the remote router must forward it back. Then the reply will also go the same way.

This allows you to use the ping to test whether the serial interface is really working.

Reply to
Barry Margolin

Oh sure ,they are pretty short. For R1, the mentioned interface is se 0/2 that is directly connected to int se 0/0 of R2.

************** This is for R1 :************************ Current configuration : 983 bytes version 12.2 service timestamps debug datetime msec service timestamps log datetime msec service password-encryption hostname R1 logging queue-limit 100 enable secret 5 $1$s76b$14F2U2FrYbXa7SA1Ybway0 enable password 7 121A091601185D username R2 password 7 031609 username R1 password 7 06145E username R3 password 7 071D72 aaa new-model aaa authentication ppp pppserial local aaa session-id common ip subnet-zero no ip domain lookup interface Ethernet0/0 ip address 10.1.0.3 255.255.0.0 half-duplex interface Serial0/0 no ip address shutdown interface Serial0/1 no ip address shutdown interface Serial0/2 ip address 172.16.2.1 255.255.255.0 encapsulation ppp ppp authentication chap pppserial no ip http server ip classless ip route 0.0.0.0 0.0.0.0 10.1.0.1 radius-server authorization permit missing Service-Type line con 0 password 7 13061B13181F line aux 0 line vty 0 4 password 7 121A09160118 transport input telnet end ********** And this is for R2 :*********************** Current configuration : 920 bytes version 12.2 service timestamps debug uptime service timestamps log uptime no service password-encryption hostname R2 logging queue-limit 100 enable secret 5 $1$s8Iq$LJvgC7mjvKlzjcbSU2sc1/ enable password class1 username R2 password 0 r2 username R1 password 0 r1 username R3 password 0 r3 aaa new-model aaa authentication ppp pppserial local aaa session-id common ip subnet-zero interface Ethernet0/0 ip address 10.1.0.2 255.255.255.0 half-duplex no cdp enable interface Serial0/0 ip address 172.16.2.2 255.255.255.0 encapsulation ppp clockrate 64000 no cdp enable ppp chap hostname r3 interface BRI0/0 no ip address shutdown no ip http server ip classless ip route 0.0.0.0 0.0.0.0 10.1.0.1 radius-server authorization permit missing Service-Type line con 0 password class line aux 0 line vty 0 4 password class transport input pad v120 telnet rlogin udptn end

Thanks for checking them.

DT

Reply to
dt1649651

Thanks for the explanation. I turned on the debug ip packet and saw what you explained. Interesting !

DT

Reply to
dt1649651

Oh sure ,they are pretty short. For R1, the mentioned interface is se 0/2 that is directly connected to int se 0/0 of R2.

************** This is for R1 :************************ Current configuration : 983 bytes version 12.2 service timestamps debug datetime msec service timestamps log datetime msec service password-encryption hostname R1 logging queue-limit 100 enable secret 5 $1$s76b$14F2U2FrYbXa7SA1Ybway0 enable password 7 121A091601185D username R2 password 7 031609 username R1 password 7 06145E username R3 password 7 071D72 aaa new-model aaa authentication ppp pppserial local aaa session-id common ip subnet-zero no ip domain lookup interface Ethernet0/0 ip address 10.1.0.3 255.255.0.0 half-duplex interface Serial0/0 no ip address shutdown interface Serial0/1 no ip address shutdown interface Serial0/2 ip address 172.16.2.1 255.255.255.0 encapsulation ppp ppp authentication chap pppserial no ip http server ip classless ip route 0.0.0.0 0.0.0.0 10.1.0.1 radius-server authorization permit missing Service-Type line con 0 password 7 13061B13181F line aux 0 line vty 0 4 password 7 121A09160118 transport input telnet end ********** And this is for R2 :*********************** Current configuration : 920 bytes version 12.2 service timestamps debug uptime service timestamps log uptime no service password-encryption hostname R2 logging queue-limit 100 enable secret 5 $1$s8Iq$LJvgC7mjvKlzjcbSU2sc1/ enable password class1 username R2 password 0 r2 username R1 password 0 r1 username R3 password 0 r3 aaa new-model aaa authentication ppp pppserial local aaa session-id common ip subnet-zero interface Ethernet0/0 ip address 10.1.0.2 255.255.255.0 half-duplex no cdp enable interface Serial0/0 ip address 172.16.2.2 255.255.255.0 encapsulation ppp clockrate 64000 no cdp enable ppp chap hostname r3 interface BRI0/0 no ip address shutdown no ip http server ip classless ip route 0.0.0.0 0.0.0.0 10.1.0.1 radius-server authorization permit missing Service-Type line con 0 password class line aux 0 line vty 0 4 password class transport input pad v120 telnet rlogin udptn end

Thanks for checking them.

DT

Reply to
dt1649651

Cabling-Design.com Forums website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.