Variations on IS-IS over ATM
Note
the VC descriptor is used!!
Not the PVC descriptor on the ATM switch!!
Point-to-Point not covered here, yet. That case is more straightforward, anyway: See Martey, pg. 268.
Items in red are the parts that took a while to get right
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Physical interface
r7505#
interface
Loopback2 ip address 192.168.100.9 255.255.255.248 ip router isis interface
ATM1/0 ip address 192.168.100.2 255.255.255.248 ip router isis map-group otherend atm pvc 765 0 765 aal5snap no atm ilmi-keepalive router
isis net 47.0001.0001.0001.1921.6801.3033.00 map-list
otherend ip 192.168.100.1 atm-vc 765 broadcast clns 47.0001.0001.0001.1921.6801.3034.00 atm-vc 765 broadcast rsp7000#
interface
Loopback0 ip address 192.168.255.210 255.255.255.255 ip router isis ! interface
Loopback1 ip address 192.168.12.9 255.255.255.248 ip router isis ! interface
Loopback2 ip address 192.168.12.17 255.255.255.248 ip router isis ! interface
ATM0/0 ip address 192.168.100.1 255.255.255.248 ip router isis map-group otherend atm uni-version 3.1 atm pvc 765 0 765 aal5snap no atm ilmi-keepalive router
isis net 47.0001.0001.0001.1921.6825.5210.00 is-type level-1 map-list
otherend ip 192.168.100.2 atm-vc 765 broadcast clns
47.0001.0001.0001.1921.6801.3033.00 atm-vc 765 broadcast Also
applicable to mulipoint subinterfaces.
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Gateway
of last resort is not set
192.168.12.0/29 is subnetted, 3 subnets C
192.168.12.64 is directly connected, Loopback1 i
L1 192.168.12.8
[115/20] via 192.168.100.1, ATM1/0 i
L1 192.168.12.16
[115/20] via 192.168.100.1, ATM1/0 C
192.168.6.0/24 is directly connected, Ethernet2/0
192.168.255.0/32 is subnetted, 2 subnets i
L1 192.168.255.210
[115/20] via 192.168.100.1, ATM1/0 C
192.168.255.252 is directly connected, Loopback0
192.168.100.0/29 is subnetted, 2 subnets C
192.168.100.8 is directly connected, Loopback2 C
192.168.100.0 is directly connected, ATM1/0 Gateway
of last resort is not set
192.168.12.0/29 is subnetted, 2 subnets C
192.168.12.8 is directly connected, Loopback1 C
192.168.12.16 is directly connected, Loopback2
192.168.255.0/32 is subnetted, 1 subnets C
192.168.255.210 is directly connected, Loopback0
192.168.100.0/29 is subnetted, 2 subnets i
L1 192.168.100.8
[115/20] via 192.168.100.2, ATM0/0 C
192.168.100.0 is directly connected, ATM0/0
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|
As above using a different VCD to show proper usage
r7505#
interface
ATM1/0 ip
address 192.168.100.2 255.255.255.248 ip
router isis map-group
rsp7000 atm
pvc 33 0 765 aal5snap no
atm ilmi-keepalive ! ! router
isis net
47.0001.0001.0001.1921.6801.3033.00 ! ! map-list
rsp7000 ip
192.168.100.1 atm-vc 33 broadcast clns
47.0001.0001.0001.1921.6801.2034.00 atm-vc 33 broadcast ! rsp7000# interface
ATM0/0 ip
address 192.168.100.1 255.255.255.248 ip
router isis map-group
r7505 atm
uni-version 3.1 atm
pvc 1 0 5 qsaal atm
pvc 2 0 16 ilmi atm
pvc 33 0 765 aal5snap no
atm ilmi-keepalive ! router
isis net
47.0001.0001.0001.1921.6825.5210.00 is-type
level-1 ! map-list
r7505 ip
192.168.100.2 atm-vc 33 broadcast clns
47.0001.0001.0001.1921.6801.2033.00 atm-vc 33 broadcast !
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Gateway
of last resort is not set
192.168.12.0/29 is subnetted, 3 subnets C
192.168.12.64 is directly connected, Loopback1 i
L1 192.168.12.8
[115/20] via 192.168.100.1, ATM1/0 i
L1 192.168.12.16
[115/20] via 192.168.100.1, ATM1/0 C
192.168.6.0/24 is directly connected, Ethernet2/0
192.168.255.0/32 is subnetted, 2 subnets i
L1 192.168.255.210
[115/20] via 192.168.100.1, ATM1/0 C
192.168.255.252 is directly connected, Loopback0
192.168.100.0/29 is subnetted, 1 subnets C
192.168.100.0 is directly connected, ATM1/0 r7505#
Gateway
of last resort is not set
192.168.12.0/29 is subnetted, 2 subnets C
192.168.12.8 is directly connected, Loopback1 C
192.168.12.16 is directly connected, Loopback2
192.168.255.0/32 is subnetted, 1 subnets C
192.168.255.210 is directly connected, Loopback0
192.168.100.0/29 is subnetted, 2 subnets i
L1 192.168.100.8
[115/20] via 192.168.100.2, ATM0/0 C
192.168.100.0 is directly connected, ATM0/0
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PVC with multipoint sub-interfaces
r7505#
sh
run | be ATM interface
ATM1/0 no
ip address no
atm ilmi-keepalive ! ! interface
ATM1/0.33 multipoint ip
address 192.168.12.33 255.255.255.248 ip
router isis map-group
rsp7000 atm
pvc 33 0 765 aal5snap isis
priority 127 !
router
isis net
47.0001.0001.0001.1921.6801.3033.00 !
map-list
rsp7000 clns
47.0001.0001.0001.1921.6825.5210.00 atm-vc 33 broadcast ip
192.168.12.34 atm-vc 33 broadcast ! rsp7000#
sh
run | be ATM interface
ATM0/0 no
ip address atm
uni-version 3.1 no
atm ilmi-keepalive ! interface
ATM0/0.34 multipoint ip
address 192.168.12.34 255.255.255.248 ip
router isis map-group
r7505 atm
pvc 33 0 765 aal5snap isis
priority 0 ! router
isis net
47.0001.0001.0001.1921.6825.5210.00 is-type
level-1 ! map-list
r7505 ip
192.168.12.34 atm-vc 33 broadcast clns
47.0001.0001.0001.1921.6801.3033.00 atm-vc 33 broadcast !
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Gateway
of last resort is not set
192.168.12.0/29 is subnetted, 5 subnets C
192.168.12.64 is directly connected, Loopback1 C
192.168.12.32 is directly connected, ATM1/0.33 i
L1 192.168.12.8
[115/20] via 192.168.12.34, ATM1/0.33 C
192.168.12.16 is directly connected, Loopback2 i
L1 192.168.12.24
[115/20] via 192.168.12.34, ATM1/0.33 C
192.168.6.0/24 is directly connected, Ethernet2/0
192.168.255.0/32 is subnetted, 2 subnets i
L1 192.168.255.210
[115/20] via 192.168.12.34, ATM1/0.33 C
192.168.255.252 is directly connected, Loopback0 r7505#
Gateway
of last resort is not set
192.168.12.0/29 is subnetted, 4 subnets C
192.168.12.32 is directly connected, ATM0/0.34 C
192.168.12.8 is directly connected, Loopback1 i
L1 192.168.12.16
[115/20] via 192.168.12.33, ATM0/0.34 C
192.168.12.24 is directly connected, Loopback2
192.168.255.0/32 is subnetted, 1 subnets C
192.168.255.210 is directly connected, Loopback0 rsp7000#
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This configuration is considered to be according to RFC 2225 (Classical IP) using PVCs
r7505#
interface
ATM1/0 no
ip address no
atm ilmi-keepalive ! interface
ATM1/0.33 multipoint ip
address 192.168.12.33 255.255.255.248 ip
router isis map-group
rsp7000 atm
pvc 33 0 765 aal5snap inarp 5 isis
priority 127 ! router
isis net
47.0001.0001.0001.1921.6801.3033.00 ! map-list
rsp7000 clns
47.0001.0001.0001.1921.6825.5210.00 atm-vc 33 broadcast ! rsp7000#
interface
ATM0/0 no
ip address atm
uni-version 3.1 no
atm ilmi-keepalive ! interface
ATM0/0.33 point-to-point shutdown ! interface
ATM0/0.34 multipoint ip
address 192.168.12.34 255.255.255.248 ip
router isis map-group
r7505 atm
pvc 33 0 765 aal5snap inarp 5 isis
priority 0 ! router
isis net
47.0001.0001.0001.1921.6825.5210.00 is-type
level-1 ! map-list
r7505 clns
47.0001.0001.0001.1921.6801.3033.00 atm-vc 33 broadcast !
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Gateway
of last resort is not set
192.168.12.0/29 is subnetted, 5 subnets C
192.168.12.64 is directly connected, Loopback1 C
192.168.12.32 is directly connected, ATM1/0.33 i
L1 192.168.12.8
[115/20] via 192.168.12.34, ATM1/0.33 C
192.168.12.16 is directly connected, Loopback2 i
L1 192.168.12.24
[115/20] via 192.168.12.34, ATM1/0.33 C
192.168.6.0/24 is directly connected, Ethernet2/0
192.168.255.0/32 is subnetted, 2 subnets i
L1 192.168.255.210
[115/20] via 192.168.12.34, ATM1/0.33 C
192.168.255.252 is directly connected, Loopback0 r7505# Gateway
of last resort is not set
192.168.12.0/29 is subnetted, 4 subnets C
192.168.12.32 is directly connected, ATM0/0.34 C
192.168.12.8 is directly connected, Loopback1 i
L1 192.168.12.16
[115/20] via 192.168.12.33, ATM0/0.34 C
192.168.12.24 is directly connected, Loopback2
192.168.255.0/32 is subnetted, 1 subnets C
192.168.255.210 is directly connected, Loopback0 rsp7000#
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RFC 2225 using SVCs (clns map is sort of kludgey, but it works)
r7505#
interface
ATM1/0 no
ip address atm
pvc 1 0 5 qsaal atm
pvc 2 0 16 ilmi no
atm ilmi-keepalive ! interface
ATM1/0.33 multipoint ip
address 192.168.12.33 255.255.255.248 ip
router isis map-group
rsp7000a atm
esi-address 192168012033.00 atm
arp-server nsap 47.000100010001000100010001.192168012034.00 isis
priority 0 ! router
isis net
47.0001.0001.0001.1921.6801.3033.00 ! map-list
rsp7000a clns
47.0001.0001.0001.1921.6825.5210 atm-nsap =>
47.000100010001000100010001.192168012034.00 broadcast
rsp7000#
interface
ATM0/0 no
ip address atm
uni-version 3.1 atm
pvc 1 0 5 qsaal atm
pvc 2 0 16 ilmi no
atm ilmi-keepalive ! ! interface
ATM0/0.34 multipoint ip
address 192.168.12.34 255.255.255.248 ip
router isis map-group
r7505a atm
esi-address 192168012034.00 atm
arp-server self isis
priority 127 ! router
isis net
47.0001.0001.0001.1921.6825.5210.00 is-type
level-1 ! ! map-list
r7505a clns
47.0001.0001.0001.1921.6801.3033.00 atm-nsap =>
47.000100010001000100010001.192168012033.00 broadcast !
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Gateway
of last resort is not set
192.168.12.0/29 is subnetted, 5 subnets C
192.168.12.64 is directly connected, Loopback1 C
192.168.12.32 is directly connected, ATM1/0.33 i
L1 192.168.12.8
[115/20] via 192.168.12.34, ATM1/0.33 C
192.168.12.16 is directly connected, Loopback2 i
L1 192.168.12.24
[115/20] via 192.168.12.34, ATM1/0.33 C
192.168.6.0/24 is directly connected, Ethernet2/0
192.168.255.0/32 is subnetted, 2 subnets i
L1 192.168.255.210
[115/20] via 192.168.12.34, ATM1/0.33 C
192.168.255.252 is directly connected, Loopback0 r7505(tcl)#
Gateway
of last resort is not set
192.168.12.0/29 is subnetted, 4 subnets C
192.168.12.32 is directly connected, ATM0/0.34 C
192.168.12.8 is directly connected, Loopback1 i
L1 192.168.12.16
[115/20] via 192.168.12.33, ATM0/0.34 C
192.168.12.24 is directly connected, Loopback2
192.168.255.0/32 is subnetted, 1 subnets C
192.168.255.210 is directly connected, Loopback0 rsp7000(tcl)#
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Multi-spoke Hub-and-Spoke with SVC's (RFC 2225).
Spoke 1: r7010# interface
Loopback1 ip
address 192.168.255.201 255.255.255.255 ip
router isis ! interface
Loopback2 ip
address 192.168.12.41 255.255.255.248 ip
router isis ! interface
ATM2/0 no
ip address atm
uni-version 3.1 atm
pvc 1 0 5 qsaal atm
pvc 2 0 16 ilmi no
atm ilmi-keepalive ! interface
ATM2/0.35 multipoint ip
address 192.168.12.35 255.255.255.248 ip
router isis map-group
rsp7000a atm
esi-address 192168012035.00 atm
arp-server nsap 47.000100010001000100010001.192168012034.00 isis
priority 0 ! router
isis net
47.0001.0001.0001.1921.6801.2035.00 ! map-list
rsp7000a ! to r7505 clns
47.0001.0001.0001.1921.6801.2033.00 atm-nsap => 47.000100010001000100010001.192168012033.00 broadcast ! to rsp7000 (arp-server/hub) clns
47.0001.0001.0001.1921.6801.2034.00 atm-nsap => 47.000100010001000100010001.192168012034.00 broadcast Spoke 2: r7505# interface
Loopback2 ip
address 192.168.12.17 255.255.255.248 ip
router isis ! interface
Loopback3 ip
address 192.168.255.213 255.255.255.255 ip
router isis ! interface
ATM1/0 no
ip address atm
pvc 1 0 5 qsaal atm
pvc 2 0 16 ilmi no
atm ilmi-keepalive ! interface
ATM1/0.33 multipoint ip
address 192.168.12.33 255.255.255.248 ip
router isis map-group
rsp7000a atm
esi-address 192168012033.00 atm
arp-server nsap 47.000100010001000100010001.192168012034.00 isis
priority 0 ! router
isis net
47.0001.0001.0001.1921.6801.2033.00 ! map-list
rsp7000a ! to rsp7000 (arp-server/hub) clns
47.0001.0001.0001.1921.6801.2034.00 atm-nsap => 47.000100010001000100010001.192168012034.00 broadcast ! to r7010 clns
47.0001.0001.0001.1921.6801.2035.00 atm-nsap => 47.000100010001000100010001.192168012035.00 broadcast ! Hub: rsp7000# interface
Loopback0 ip
address 192.168.255.210 255.255.255.255 ip
router isis ! interface
Loopback1 ip
address 192.168.12.9 255.255.255.248 ip
router isis ! interface
Loopback2 ip
address 192.168.12.25 255.255.255.248 ip
router isis ! interface
ATM0/0 no
ip address atm
uni-version 3.1 atm
pvc 1 0 5 qsaal atm
pvc 2 0 16 ilmi no
atm ilmi-keepalive ! ! interface
ATM0/0.34 multipoint ip
address 192.168.12.34 255.255.255.248 ip
router isis map-group
hubtospoke atm
esi-address 192168012034.00 atm
arp-server self isis
priority 127 ! router
isis net
47.0001.0001.0001.1921.6801.2034.00 ! map-list
hubtospoke ! to r7505 clns
47.0001.0001.0001.1921.6801.2033.00 atm-nsap => 47.000100010001000100010001.192168012033.00 broadcast ! to r7010 clns
47.0001.0001.0001.1921.6801.2035.00 atm-nsap => 47.000100010001000100010001.192168012035.00 broadcast !
This configuration appears to be truly Hub-and-Spoke because the two "spoke" routers show two VCs each, and the "hub" shows four VCs. It appears that the two spokes form all their connections via the hub. |
Gateway
of last resort is not set
192.168.12.0/29 is subnetted, 5 subnets C
192.168.12.32 is directly connected, ATM2/0.35 C
192.168.12.40 is directly connected, Loopback2 i
L1 192.168.12.8
[115/20] via 192.168.12.34, ATM2/0.35 i
L1 192.168.12.16
[115/20] via 192.168.12.33, ATM2/0.35 i
L1 192.168.12.24
[115/20] via 192.168.12.34, ATM2/0.35 C
192.168.9.0/24 is directly connected, Serial0/2
192.168.255.0/32 is subnetted, 4 subnets i
L1 192.168.255.213
[115/20] via 192.168.12.33, ATM2/0.35 i
L1 192.168.255.210
[115/20] via 192.168.12.34, ATM2/0.35 C
192.168.255.201 is directly connected, Loopback1 C
192.168.255.253 is directly connected, Loopback0 r7010#
r7010#sh
atm vc
VCD /
Peak
Avg/Min Burst Interface
Name
VPI
VCI
Type
Encaps
SC
Kbps
Kbps
Cells
Sts 2/0
1
0
5
PVC
SAAL
UBR 155000
UP 2/0
2
0
16
PVC
ILMI
UBR
155000
UP 2/0.35
3
0
32
SVC
SNAP
UBR
155000
UP 2/0.35
5
0
34 SVC
SNAP
UBR
155000
UP r7010#
Gateway
of last resort is not set
192.168.12.0/29 is subnetted, 6 subnets C
192.168.12.64 is directly connected, Loopback1 C
192.168.12.32 is directly connected, ATM1/0.33 i
L1 192.168.12.40
[115/20] via 192.168.12.35, ATM1/0.33 i
L1 192.168.12.8
[115/20] via 192.168.12.34, ATM1/0.33 C
192.168.12.16 is directly connected, Loopback2 i
L1 192.168.12.24
[115/20] via 192.168.12.34, ATM1/0.33 C
192.168.6.0/24 is directly connected, Ethernet2/0
192.168.255.0/32 is subnetted, 4 subnets C
192.168.255.213 is directly connected, Loopback3 i
L1 192.168.255.210
[115/20] via 192.168.12.34, ATM1/0.33 i
L1 192.168.255.201
[115/20] via 192.168.12.35, ATM1/0.33 C
192.168.255.252 is directly connected, Loopback0 r7505#
r7505#sh
atm vc
VCD /
Peak
Avg/Min Burst Interface
Name
VPI
VCI
Type
Encaps
SC
Kbps
Kbps
Cells
Sts 1/0
1
0
5
PVC
SAAL
UBR
155000
UP 1/0
2
0
16
PVC
ILMI
UBR 155000
UP 1/0.33
5
0
34
SVC
SNAP
UBR
155000
UP 1/0.33
6
0
35
SVC
SNAP
UBR
155000
UP r7505#
Gateway
of last resort is not set
192.168.12.0/29 is subnetted, 5 subnets C
192.168.12.32 is directly connected, ATM0/0.34 i
L1 192.168.12.40
[115/20] via 192.168.12.35, ATM0/0.34 C
192.168.12.8 is directly connected, Loopback1 i
L1 192.168.12.16
[115/20] via 192.168.12.33, ATM0/0.34 C
192.168.12.24 is directly connected, Loopback2
192.168.255.0/32 is subnetted, 3 subnets i
L1 192.168.255.213
[115/20] via 192.168.12.33, ATM0/0.34 C
192.168.255.210 is directly connected, Loopback0 i
L1 192.168.255.201
[115/20] via 192.168.12.35, ATM0/0.34 rsp7000#
rsp7000#sh
atm vc
VCD /
Peak
Avg/Min Burst Interface
Name
VPI
VCI
Type
Encaps
SC
Kbps
Kbps
Cells
Sts 0/0
1
0
5
PVC
SAAL
UBR
155000
UP 0/0
2
0
16
PVC
ILMI
UBR
155000
UP 0/0.34
3
0
32
SVC
SNAP
UBR
155000
UP 0/0.34
4
0
33
SVC
SNAP
UBR
155000
UP 0/0.34
5
0
34
SVC
SNAP
UBR
155000
UP 0/0.34
6
0
35
SVC
SNAP
UBR
155000
UP rsp7000#
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